International Journal of Business Management and Economic Review Vol. 4, No. 04; 2021 ISSN: 2581-4664 http://ijbmer.org/ Page 386 RELATIONSHIP CONTROL BETWEEN FIVE PRECEPTS PRACTICE AND ADULT HAPPINESS: THE EVIDENCE OF THE SURVEY IN VIETNAM Nguyen Nghi Thanh Ha Noi University of Home Affairs, Vietnam Do Thu Huong Ha Noi University of Home Affairs, Vietnam Tran Quyet Thang Ha Noi University of Home Affairs, Vietnam Nguyen Thi Hop Ha Noi National University, Vietnam Phuong Huu Tung Ha Noi University of Home Affairs, Vietnam http://doi.org/10.35409/IJBMER.2021.3306 ABSTRACT Vietnam is a country of religious diversity, in which Buddhism has the most significant participation. In addition to practicing the Five Precepts, many Vietnamese people have registered for active mindfulness meditation classes recently. This fact has received significant attention from scientists to add to the evidence of previous studies and enrich the research literature. This study explores the role of mindfulness meditation practice as a moderator of the relationship between five precepts practice and subjective perception well-being of Vietnamese adults. This study was conducted through a cross-sectional survey using an intentional sampling technique (n=200). Multivariable linear regression analysis and moderator regression were applied to prove the hypotheses. Research results show a positive and meaningful relationship between practicing mindfulness meditation, practicing the five precepts and feeling subjective happiness. In particular, mindfulness meditation acts as a moderating variable between the practice of the five sexes and the subjective feeling of happiness. Keyword: Mindfulness, Five precepts, Happiness, Vietnamese adults. 1. INTRODUCTION Buddhism was present in Vietnam about 2000 years ago, based on absorbing influences from both India and China. Vietnamese Buddhism converges both Northern and Southern Buddhist lines and is influenced by three major sects of Northern Buddhism, namely Zen Buddhism, Pure Land Buddhism and Tantric Buddhism. At the same time, Vietnamese Buddhism is also influenced by Confucianism, Taoism, and folk customs, so it creates distinct features. Vietnamese Buddhism has a history of nearly two decades (Vietnam Buddhist Sangha Executive Council, 2013). Vietnamese Buddhists got 14.9% of the country's population (General Statistics Office of Vietnam, 2019). Although with such a small number of Buddhists, mindfulness meditation is now very popular in Vietnam. Vietnamese people learn meditation thanks to the benefits that mindfulness