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Thang NT, Phuong NT, Hanh PK, Lan NM, Quynh NP, Phuong PTM, Ly DT, Ngan DTH. HAPPINESS INDICATOR OF STUDENTS OF VNU UNIVERSITY OF LANGUAGES AND INTERNATIONAL STUDIES DURING COVID-19 PANDEMIC LOCKDOWN IN HANOI, VIETNAM. JFS. 2022;38(4):76-86. Accessed March 29, 2024. https://jfs.ulis.vnu.edu.vn/index.php/fs/article/view/5042