NGUYEN, Ngoc Hien; BUI, Nguyen Bich Thy. Teachers’ Perceptions of Using Digital Learning Materials in Teaching Speaking and Listening Skills Based on Speech Etiquette to Grade 2 Students. Dong Thap University Journal Science - Asian Journal of Educational Sciences, [S. l.], v. 1, n. 2, p. 119–133, 2026. DOI: 10.52714/dthu.ajes.32.2042. Disponível em: https://ajesdthu.vn/index.php/ajes/article/view/32. Acesso em: 5 nov. 2026.