Nam-Phuong Nguyen, Van-Thang Le, Huong-Giang Nguyen, and Thi Thanh-Hang Nguyen. “Teachers’ Awareness of Happy Schools With UNESCO Items: A Case Study of a Primary School in Hanoi, Vietnam”. The VMOST Journal of Social Sciences and Humanities 64, no. 2 (August 20, 2022): 38-47. Accessed April 28, 2025. https://vmostscience.vjst.vn/index.php/vmost_jossh/article/view/274.