The study aims to examine the factors affecting sustainable tourism development. First, the paper presents the literature review to show the related theories and overview of the tourism sector in Vietnam. Secondly, the research model and hypotheses are represented to test the relationships between influencing factors and sustainable tourism development. Finally, 329 questionnaires had been collected from state management agencies and tourism enterprises. By using SPSS and Smart-PLS-SEM, the research shows that seven factors were affecting on sustainable tourism development in Vietnam. Specifically, social engagement has the strongest effect on sustainable tourism development, followed by state managerial competence respectively, tourism service quality, the quality of tourism human resource, infrastructure development, material tourism facilities and tourism resource.

This study focuses on investigating the relationship between tourist quality service, satisfaction and loyalty among international visitors who came to Vietnam. Specifically, this research also aims to discover the mediating effects of tourist satisfaction on the relationship between tourist quality service and loyalty (revisit and recommend to others). By using the data collected from 516 international visitors who travelled in Vietnam, authors use a meta-analytic path analysis to show that only two factors of tourist quality service had significant effects on tourist satisfaction and loyalty, including tangibles and responsiveness. Moreover, tangibles and responsiveness not only had direct effects, but they also they had some indirect impacts on tourist loyalty throughout tourist satisfaction. Interestingly, the relationship between tourist satisfaction and their loyalty was strongest.