Thang, N.T., Phuong, N.T., Hanh, P.K., Lan, N.M., Quynh, N.P., Phuong, P.T.M., Ly, D.T. and Ngan, D.T.H. 2022. HAPPINESS INDICATOR OF STUDENTS OF VNU UNIVERSITY OF LANGUAGES AND INTERNATIONAL STUDIES DURING COVID-19 PANDEMIC LOCKDOWN IN HANOI, VIETNAM. VNU Journal of Foreign Studies. 38, 4 (Aug. 2022), 76-86.