Nguyen, N. H. and Bui, N. B. T. (2026) “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, 1(2), pp. 119–133. doi: 10.52714/dthu.ajes.32.2042.