The study was analyzed and evaluated the trend of urban growth in 2004 and 2019 supporting localities in planning urban development orientations in Can Tho city. Landsat images were applied using the Maximum Likelihood Classifier (MCL) classification to map the land use/land cover in Can Tho city and hotspot analysis to explore the urbanization trend. The results revealed that urban areas are mainly concentrated in Cai Rang, Ninh Kieu, Binh Thuy, and Thot Not districts. The urban area in 2004 was 6,400.2 hectares (ha) and 16,007.0 ha in 2019. The urban proportion increased from 4.45% to 11.12%. The average annual urbanization rate in the whole city was 0.43%/year in which the highest rate in Ninh Kieu district at 1.52%/year and the lowest rate in Co Do district at 0.19%/year. Urban density in Ninh Kieu district is the highest value with 45.9% in 2004 and 65.62% in 2019. The urbanization trends forming residential chains were along the Hau river, the Can Tho river toward the southeast and main national highways.

Although widely used in industry, with fixed parameters, the proportional integral (PI) controller is difficult to adapt to real conditions. Meanwhile, the sliding mode control (SMC) gives stable responses on nonlinear systems, but it has some limitations. This paper aims to propose a solution to combine the PI control and the radial basis function (RBF) neural network-based adaptive SMC, called PI-SMC control. The principle of this combination is to take SMC advantages to overcome the limitations of the PI controller and use the PI controller to push the sliding surface rapidly converge. The PI-SMC controller is tested on the liquid flow control device RT020 of the Gunt-Hamburg. The results show that the initial values of the RBF neural network and the coefficient of sliding surface has a great influence on the control quality. The experiment also shows that the adaptive sliding mechanism can overcome the limitation of fixed PI controller. With selected initial values, the PI-SMC controller has improved the flow response on the RT020 with the overshoot is less than 5 (%); the settling time is less than 2 (s); and the steady-state error is less than 0.3 (l/h).

The ability to make accurate and timely decisions in agriculture is directly related to the level of smart agriculture. From the perspective of scientific management, it can be seen that the problem of collecting, managing and sharing the necessary data sources for agricultural research has become urgent. This paper concerns the causes of the lack of agricultural research data sources in Vietnam, which are separated into two aspects: (1) the ability to manage and share public data sources and (2) the research community's capacity to exploit open data sources. On that basis, a global solution for data management planning based on FAIR principles (to be Findable, Accessible, Interoperable, Reusable) is proposed. Developing a Data Management Plan (DMP - Data Management Plan) is the main solution, applied on two sectors: (1) Government sector (public service) – which is directly affected by legal policies on building open data repositories, and (2) The sector of research and academic units (research centers, institutes, schools) – the data management mechanism on this sector is mostly voluntary, but it is very dynamic in the ability to exploit open data sources and high capacity in data analysis.

Public opinion on social media has been paid much attention in new era of information technology. It has crucial impact on daily life and the operations of organizations. For that reason, analyzing public opinion will help the organizations to appropriately adjust their behavior. The objective of this study is to evaluate public opinion by analyzing comments on social network (Facebook) related to Can Tho University; then to help the university make appropriate adjustment policies. First of all, the public opinions (comments) were collected, divided into identify consensus (same direction) or disagree (opposite) opinions to the university activities. Then, two machine learning models, SVM and Neural Network, were installed for training, running experiments and comparing the results. Experimental results show that the Neural Network machine learning model has a quite high evaluation result of 85%, and the SVM model obtains 83% of accuracy.

In this study, the Hamiltonian model was built by using the tight binding (TB) calculation that computes the electronic properties of hexagonal chromium nitride (h-CrN) for planar and buckled structures. Based on the results obtained and by comparison with the other results from the similar model such as the ab initio method on different structures and identified the structural parameters for the nearest neighborhood interactions of the atoms. In addition, this paper also shows that the h-CrN exhibits metallicity of thin honeycomb materials in flat and buckled states. However, the electronic structure of the material in the buckled state has  changed more pronounced than the one in planar structure, which predicts interesting variations of the electronic distributions and its properties under the influence of external stimuli as well as the applicability to future spintronic technology.

The removal of high concentration N and P from wastewater is an important issue to reduce water and environmental pollution and improve water quality significantly. The aim of this study was to recover N and P from real wastewater through crystallization process at different operational conditions. The struvite (Magnesium ammonium phosphate hydrate, MgNH4PO4.6H2O formation recovered from real wastewater containing high concentration of N and P has been studied experimentally. The effects of pH, Mg/P molar ratio, precipitated temperature and reaction time on the yield of struvite recovery were discussed. The pH and Mg/P molar ratio are the significant factors influencing P recovery efficiency. Yield of recovered struvite 95,2±3,1 % was observed at pH8.3, Mg/P molar ratio of 1:1, at 30°C and 90 min of reaction and 60 min for aging period. Moreover, the temperature of crystallization process showed minor effects on the crystal production in the range of 20-40°C. The X-ray diffraction (XRD) pattern confirmed the formation of struvite structure recovered from the real wastewater source. The obtained valuable struvite recovered from wastewaters contains high nutrient of Mg, N and P which isproposed for slow-release fertilizer for agriculture applications.

The paper was to determine the calibration area of square, leaf area and canopy area by photograph of iPhone 6s Plus and measurement of ImageJ software, without a need  for the leaf scanners and functional program. Seven calibration areas of square with different sizes (4 - 196 cm2) and color (purple, green and red) and different heights of camera phone (25 - 125 cm), digital image of fourteen leaves with​​ various shapes and sizes, the canopy different ages of Chrysanthemum sp. were selected for study. The results, the overall average relative error between area measurement by ImageJ and calibration area of square were 0.9%,  y = 1.0005x + 0.2262 and R2 = 0.9987. The fourteen leaf surface area of​​ various shapes which were 4.6% of %CV, y = 0.9902x + 2.1802 and R2 = 0.9953. In addition, it has applied to determine the canopy of Chrysanthemum, increased canopy level from the one week old to eight weeks old which was from 152 ± 18  to  4026  ± 978 mm2. It was concluded that iPhone 6s Plus and ImageJ software were sufficient for leaf area and canopy measurements. This result is particularly useful for studying crop physiology.

Inflammatory processes are increasingly being identified at the core of many different disease states (e.g. heart disease, cancer, diabetes). While non-steroidal anti-inflammatory drugs are generally safe, there are some serious side effects that can be associated with their usage, particularly when given systemically or orally. Therefore, anti-inflammatory strategies available through drug delivery have undergone renewed interest. Novel drug delivery systems like systemic targeting or encapsulation, local injection, localized delivery, implant coating or incorporation, and transdermal delivery are promising tools as they have been successful in overcoming the disadvantages associated with conventional drug delivery systems like low solubility and permeability, poor bioavailability, degradation by gastrointestinal enzymes, first-pass metabolism, food interactions, and toxicity. This review comments on a sampling of existing methods for localized or targeted delivery of non-steroidal anti-inflammatory drugs, with the goal of helping future research focus on bettering methods shown to be effective and filling the gaps of knowledge in this field.

In this study, recycled high-density polyethylene (r-HDPE)-based composite materials reinforced with Nypa fruticans flower stalk (NFFS) fibers were fabricated by hot-pressing methods. First, the fibers extracted from NFFS were chemically treated and pressed to create a random mat. Next, plastic containers from HDPE were collected, washed, chopped, and hot-pressed to create thin flat sheets. Finally, the composite materials were formed by hot-pressing alternating layers of plastics and fibers. The morphology and composition changes of NFFS fibers before and after chemical treatment were observed via scanning electron microscope and thermogravimetric analysis. The effects of the volume ratio of NFFS fibers on the shrinkage, tensile strength, flexural strength, and impact strength of composite materials were also investigated. As a result, NFFS fibers have a cellulose content of ~34% with lots of microfibers in a parallel arrangement. It is interesting that NFFS fibers do not possess large central holes, which make a significant difference in mechanical properties compared to some other natural fibers. The material's mechanical properties are the best at a fiber volume ratio of 60%, having a tensile strength of ~45 MPa, a flexural strength of ~46 MPa, and an impact strength of ~19 KJ.m-2. As expected, these results are approximately two times higher than that of the composite materials from coir fibers under the same conditions.

This study aimed to investigate effect of jackfruit leaves (JL) and young jackfruit by-product (YJ) replace for elephant grass (EG) on in vitro digestibility, ruminal fermentation and CH4 production using rumen fluid from 4 male Saanen F2 goats (♂ Saanen × ♀ Bach Thao). The experiment was conducted as a completely randomized design including 5 treatments and 4 replicates. The treatments, beside 40% dry matter (DM) from concentrated feed for all diets, were diffent replacing of EG by JL and/or YJ, as follows: NT1 – 60% EG, NT2 – 30% EG + 30% YJ, NT3 – 30% EG + 30% JL, NT4 – 30% EG + 15% YJ + 15% JL, and NT5 30% YJ + 30% JL. Results showed that total VFA concentration was higher in NT3 and NT5 (73.0 vs 74.8%) compared with the lowest value (57.7%) in NT1 (P

This study aimed to evaluate milk yield, milk composition and nutrient status of lactating dairy cows raised at small-holder farms in Can Tho city, and to provide re-formulated diets which were suitable for these cows. The study was carried out in 35 farms, in which 10 representative farms were collected for sampling. The result showed that all cows were crossbred HF breed, ≥F2, produced 13.2 kg milk/day and had high milk fat (4,03-4,84%), but these values showed high fluctuation among cows and farmers. Intakes of DM, CP and NEL were 15.4 kg/d, 2.38 kg/d and 19.7 MCal/d, respectively. However, feed cost of cows in this study was still high, 73,254 VND/day. Six re-formulated diets met nutrient requirement for lactating cows based on standard of NRC in 2001, and could reduce 7.17-20.8% feed cost. In conclusion, investigated cows produced high milk yield and composition, fed enough nutrients, but feed cost was still high. The use of re-formulated diets might help to maintain great milk yield and composition while allowing reduction in feed cost.

The survey was carried out to determine the antibiotic resistance and prevalence rate of beta-lactamase genes in 21 Enterohemorrhagic Escherichia coli (EHEC) strains and 38 Enterotoxigenic Escherichia coli (ETEC)strains isolated from cattle in Ben Tre province. The EHEC strains showed the high resistance rate against colistin (71.43%) and ampicillin (61.90%), however, they still were significantly sensitive to doxycycline (100.00%), amikacin (95.24%). Among 14 multi-drug resistance patterns in EHEC, the popular pattern was Cz+Co (9.52%). Of ETEC strains, those strains showed high sensitivity to the examined antibiotics, 100% strains exhibited the sensitivity to gentamicin, amikacin, levofloxacin, and ofloxacin (100%). Among of 13 multi-drug resistance patterns in ETEC, the pattern of Am+Ac+Sm and Am+Cu+Co were present at the high rate (5.26%). The PCR results indicated that EHEC and ETEC strains harbored 4/5 beta-lactamase genes examined. The blaampC gene was detected at the highest rate in EHEC, ETEC with 57.14%, 42.11% respectively. The blaCMY gene was not found in both two groups. There were three combination patterns of beta-lactamase genes, the pattern of blaampC+blaTEM was the most recorded (10.17%).

Threeleaf cayratia (Cayratia trifolia L.) has been confirmed to possess high biological activity compounds that are antioxidant and reduce the growth of tumors. Threeleaf cayratia grows naturally in the Mekong Delta region of Vietnam, but there is limited research on this plant. This article provides the results on the isolation and the selection of thermotolerant yeast strains for the applications of wine fermentation in the context of global warming conditions. Out of the threeleaf cayratia samples collected in the Mekong Delta, 151 yeast strains have been isolated and classified into four genera, namely Saccharomyces, Hanseniaspora, Pichia, and Candida. Among them, 64/151 strains could grow at 37°C on plates supplemented with 9 to 12% (volume/volume) ethanol. Threeleaf cayratia fermented wine using selected thermotolerant yeast strains is good in the organoleptic evaluation and contains a high value of total polyphenol which contributes to antioxidant characteristic of the wine.

The study was conducted to determine the conditions for lectin extraction and purification from wild pea (Pueraria phaseoloides). Lectin in wild bean was first extracted in 0.9% NaCl solution with different ratios (w/v) as well as time and temperature conditions. The crude extract was then purified with ammonium sulfate at various salt precipitation concentrations, followed by affinity chromatography on Sepharose D-galactose gel to improve the purity level. The results showed that the optimal efficiency of lectin extraction was achieved in specific activity of 1.579 HAA/mg at the ratio of 1 bean:4 NaCl (w/v), at 50oC for 10 minutes. The fractional precipitation with ammonium sulfate concentration of 40% - 50% gave the highest recovery efficiency which was 35.4% with a purity increasing of 6.38 times compared to the crude sample. F1 fraction obtained from affinity chromatography had a recovery efficiency of 9.85%, and there was a rise in purity level, 16.2 times higher than crude sample. The results of SDS-PAGE electrophoresis on polyacrylamide gel 12% showed two protein bands with molecular weights of 66.0 kDa and 56.0 kDa.

One hundred and ninety-one bacterial isolates were isolated from ninety-three samples of nodules, roots and stems peanut plants cultivated in three mountainous districts of Binh Dinh province (Van Canh, Vinh Thanh, An Lao). The isolates all formed thin films (pellicles) and were able to fix nitrogen, solubilize phosphate and synthesize IAA. PCR technique was used for identifying fifteen selected good isolates. The result showed that these fifteen isolates were all endogenous bacteria. The identified bacterial isolates belong to six genera, include Acinetobacter (5 isolates), Bacillus (4 isolates), Burkholderia (2 isolates), Klebsiella (2 isolates), Enterobacter (1 isolate), and Sphingomonas (1 isolate) with the DNA homology rate from ninety-eight to ninety-nine percent.

This study was to determine the conditions effecting wine fermentation process of Phyllanthus acidus (L.) Skeels using Saccharomyces cerevisiae. Design Expert 7.0 was used to determine optimal factors including pH, °Brix and yeast cell density. The results indicated that, with pH 4.77, 24.79°Brix and 8.08 x 106 cells/mL, after 14 days of fermentation, the highest alcohol content reached 8.88 % v/v. Simultaneously, 11 compounds have been identified through spectroscopic methods, including steroids, triterpenoids, phenols, tannins, flavonoids, quinones, saponins, antocyanins, glucose, carotenoids and alkaloids from initial juice and wine product. The total polyphenol content of wine was higher than Otaheite gooseberry juice, particularly 297.573 mgGAE/L and 174.549 mgGAE/L respectively. After fermentation, the reduction DPPH capacity of wine reached an IC50 value at 45.132 μL/mL, which is higher than otaheite gooseberry juice (IC50 value at 59.973 μL/mL.), shows that wine has better antioxidant activities than the otaheite gooseberry juice.

The study on the pre-treatment and collagen extraction conditions from snakehead fish skin by using pepsin was performed. The results showed that treating snakehead fish skin with 10% butyl alcohol solution for 72 hours gave the lowest lipid content of 15.3%. Extracting samples with 0.45% pepsin for 24 hours gave the highest yield of 13.7% and maximum solubility at pH 1 - 4 and NaCl concentration from 0.2 - 0.6 M. As mentioned above, FTIR spectral analysis demonstrated that a close relationship between the number of wavelengths in the amide I and amide III regions, especially the stability of the triple helix structure, so that the obtained collagen from snakehead fish skin had the full functional group of type I collagen. Collagen had bright color with L* value of 62.4 and imino acid content was 204 (residue/1000 total amino acid residues). Results showed that pepsin can be used to replace chemicals to reduce the amount of chemicals released into the environment, taking advantage of snakehead fish skin as a raw material for collagen production.

Catechin is an important extraction of bioactive compounds from green tea leaves (Camellia sinensis). Recent studies revealed catechin abilities in preventing and treating cancers, cardiovascular diseases, high blood pressure, intestinal diseases, oral diseases, slowing down the aging process and increasing the life expectancy. The study to investigate and evaluate some conditions to create instant tea products from catechin. The results showed that the extraction yield of catechin and sweet grass at 80oC for 1 hour using water solvent was 30.91% and 31.76%, respectively. The total polyphenol content in the catechin extract was 327.47 mg GAE/g extract. The total catechin content of the catechin extract was 558.77 mg/g GAE. The formula of the instant catechin tea product has the highest organoleptic rating score with the ratio of catechin: sweet grass: maltodextrin is 2:1:27 by weight. The dry matter concentration at 15% used in the spray drying process with the highest recovery efficiency was 83.20%, and the product quality is very stable.

Pomelo had beneficial compounds such as vitamin C, polyphenols. However, pomelo juice often had an unpleasant bitter taste after pasteurizing. This study was conducted to evaluate the ability to reduce the bitterness of pomelo juice by enzymatic treatment with enzyme Biocitrus. Factors such as pH (pH natural (3.5-3.6), 4.5, 5.5 and 6.5), hydrolysis temperature (room temperature (29 – 31), 40, 50 and 60°C) and hydrolysis period (0.5, 1.0, 2.0 and 3.0 h) were evaluated in this study, respectively. The compounds like naringin, polyphenols, and vitamin C were quantified by spectrophotometer; moreover, the bitter taste was evaluated sensory by scoring test. The results showed that the suitable parameter includes the temperature of 60℃, the pH of the juice was 4.5, and the hydrolysis period of 2 hours. Under these conditions, the pasteurized pomelo juice reduced remarkably bitter taste. Besides, the sample had naringin content lower than the control sample, meanwhile, the phenolic and vitamin C contents of both samples were slightly different.

Salinity intrusion has affected (caused reduces in) rice yield and quality because rice is very sensitive to salinity. In this study, SSR markers were applied to test 20 improved rice varieties for salinity tolerance and quality (grain length and amylose content) characteristics. These 12 SSR molecular markers were linked to Quantitative Trait Loci (QTL) for salt tolerance on 12 comparable chromosomes for comparision the geneotype between the standard salt tolerance variety (Doc Phung) and the salt sensitive standard variety (IR29) with 20 improved rice varieties at Can Tho University. The results showed that there were 3 varieties with geneotypes similar to the standard varieties of salt tolerance (Doc Phung) with P1000 from 29 to 32 grams, with long grain and low amylose content (17.64%) in the variety MTL 859, the average amylose content (22.70% and 24.52%) in the varieties MTL 421 and MTL 743, respectively.  In addition, there were two varieties/lines MTL 421 and MTL 859 with the aromatic characteristic at level 2 based on the KOH 1,7% test method. This result is the basis for further studies on improved rice varieties with salt tolerance in the future.

OsHKT is a family of genes that play an important role in the salt tolerance mechanism of rice. In this study, DNA fragments of two gene groups OsHKT1 and OsHKT2 from 41 local rice varieties in the Mekong Delta were sequenced, in order to find out the genetic relationship among them. The results showed that the polymorphism was most expressed in the two genes OsHKT1;5 and OsHKT2;1 with all of 41 rice varieties showing polymorphisms in the OsHKT1;5 gene, and 25 rice varieties were variable in the OsHKT2;1 gene. This result is the basis for further studies on salt tolerance related to the OsHKT gene family of local rice varieties in the Mekong Delta.

The objective of the study was to evaluate the efficacy of NPISi salt tolerant microbial product containing several bacterial strains Bacillus aquimaris KG6-3, Burkholderia sp. BL1-10, Bacillus megaterium ST2-9 and Citrobacter freundii RTTV_12 on growth, yield of the Mot Bui Do rice cultivar and some salt affected soil characteristics in shrimp – rice farming system at Phuoc Long district, Bac Lieu province. The experiment was arranged in a completely randomized block design with 4 treatments and 4 replications. The results showed that the treatments applied with NPISi microbial product with a dose of 75 kg/ha gave higher total concentrations of Si, N, P and K in rice stem and yield and were significantly different in statistics (p

This study was conducted to evaluate the impact of saltwater intrusion on financial performance of some cropping systems on salinity affected soil in Thanh Phu district, Ben Tre province and U Minh Thuong district, Kien Giang province. Data were collected by household interviews and the Participatory Rural Appraisal approach. The study results showed that farming in the study areas is facing some problems due to the impact of seawater intrusion and salinity and acidity. Besides, the low level of education of farmers is also a big obstacle in production. In addition, the cropping systems and financial performance in the two districts were different. In Thanh Phu district, Ben Tre province, the mono-vegetable system generated the highest profit, followed by the only coconut and double rice crops per year was in the lowest profit. In U Minh Thuong district, Kien Giang province, the double rice crops in rotation with melon provided the highest profit, followed by the triple rice crops per year system; whereas the mono rice cropping system resulted in the lowest profit.

The study is to determine the distribution of Gastropods in the aquaculture areas along Hau river at An Giang and Can Tho province to serve as a basis for quality assessment of the water sources. The study was conducted by sampling benthos at 19 sites on the main river and tributaries in March, June, September and December, 2019. The results showed a total of 24 species of Gastropods belonging to 17 genera, 11 families and 7 orders. The number of species recorded in An Giang (19 species) was lower than that in Can Tho (21 species). The number of species obtained in the main river was 22 and in the tributaries was 19 species. The number of individuals fluctuated significantly from 0 to 5,447 inds/m2 and no individual was found at AG4 site during June. The density of Gastropoda on the main river and tributaries ranged from 42 to 1,341 inds/m2. The species composition and density of Gastropoda are very widely distributed and there are differences between the points, according to each the collection and on the main river and tributary in the study area. The Shannon diversity index (H’), species richness (d) and evenness index (J’) recorded on Hau river ranged from 0.9-2.0; 0.7-3.5 and 0.4-0.9, respectively. The results of H’s index implied that sampling sites were in moderate to high level of pollution. The findings also provided a database to develop a biological monitoring program in the aquaculture area along the Hau river.

A study on diversity of fish composition in the core zone of U Minh Thuong National Park was carried out from 2020 to 2021 in order to (i) identify the status of water management and fish resource, (ii) determine species composition of fish, and (iii) identify diversity levels of fish. The study was conducted at 15 sites of four habitats in the core zone and one buffer zone. At each habitat, three samppling sites were sellected with four sampling periods (May, July, October 2020 and January 2021). Different types of fishing gears, fixed and portable, were used for sampling. All fish specimens were identified to species name, weighted (g/ind.) and measured the total length (cm). Besides, Margalef index (d), Simpson index (1-D) and Shannon – Wiener index (H') were applied to evaluate biodiversity levels. The results showed that lack of freshwater in the dry season affected the significantly abundance of fish in the core zone. There were 32 fish species identified belonging to 6 orders and 17 families. In the core zone, the diversity of fish compostion was higher and stabler than that in the buffer zone in both habitats and various time in a year, influenced by different water levels.

The philosophy of Lao Tzu – Chuang Tzu (expressed in Ethical sutra and Nanhua sutra) was originally imbued by the ecological spirit of the Eastern through the ancient times. This philosophy provides us with interesting suggestions when researching the relations of natural world and humanity that relates to fairyland – a symbol of culture, unique ancient literature that has appeared in the Chinese and Vietnamese medieval literature. In the spirit of this ecology from Lao – Chuang theory, we will focus on understanding the fairyland symbol that includes two main meanings: the symbol of fairyland – where the consciousness conserver about original ecologic belongs to and the symbol of fairyland – where humans living in harmony with nature. The study about the fairyland symbol from this point of view would help finding out more about the new values of Chinese and Vietnamese medieval literature, also advancing the consciousness about the role of nature in human lives, and proving that Lao – Chuang theory is an philosophy ancient but not out of date.

This study is aimed to evaluate Hau Giang province farmers’ satisfaction levels when participating in the agricultural cooperatives. Primary data were collected through a direct survey of 107 rice-growing households participating in cooperatives. Research results show that farmers are satisfied when participating in cooperatives with an average score of 4.29/5 on the Likert scale. The results of exploratory factor analysis (EFA) and ordinary least squares regression show that the farmers’ satisfaction is determined by four groups of factors including assurance, scale efficiency, responsibility and qualifications of the management board, improvement of income and employment. Based on the results of this study, solutions were proposed; of which the cooperatives’ role is the core, to encourage people to participate more in agricultural cooperatives through improving management skills for the management board and strengthening activities in order to provide technical support, create more jobs and increase farmer's income.

This study is to develop a theoretical model of the relationship between knowledge sharing intention (KSI) and new product development (NPD) in the tourism industry with the motivating role of personal motivation, includes enjoyment (ENJ), reciprocity (REC) and rewards (REW). The research hypotheses are verified by a structural equation modeling (SEM) based on survey data  from 399 respondents who are employees of travel companies in Ho Chi Minh City. Findings revealed that all three factors of individual motivations such as ENJ, REC and REW have positive impacts on KSI. In addition, REW and KSI are found to enhance NPD in the tourism industry. Some managerial implications of the research findings are discussed.

This study is to estimated the technical efficiency of the trawl net in the East Sea of ​​the Mekong Delta using the approach of the translog stochastic frontier production function model. Data were collected through interviewing 60 vessels in Soc Trang and Bac Lieu provinces. The results showed that the average fishing production of the trawl net was 643 kg/trip and 18.9 tons/year with the time for each trip was about 4 days. The total cost for trawl net was 316 million VND/year and income was 608 million VND/year. The average technical efficiency of trawling was 86.3%. Captain-related factors such as experience, education, and age; vessel age, and production capital have an impact on the technical efficiency of the trawl net. To improve the technical efficiency of the trawl net industry, it is necessary to focus on training the captains, upgrading and exchanging large ships, and linking the market channels for the consumption of caught fishery products.