“…The research is varied, using a variety of approaches and methodologies. (Deci et al, 1981;Wigfield, 1994;Murphy, Alexander, 2000;Nguyen, 2015a;Vietnam Psycho-Pedagogical Association, 2015;Chia et al, 2016;Liu et al, 2016;Chemsi et al, 2020). There are studies that focus on understanding specific approaches in the research of university students (Wigfield, 1994;Deci, Ryan, 2000b;Murphy, Alexander, 2000;Niemiec, Ryan, 2009;Wigfield, Cambria, 2010;Duong, 2013;Ngo, Le, 2015;Liu et al, 2016;.…”