Phan Ha , U. 和 Nguyen , A. 2024. Difficulties of EFL teachers in teaching speaking skills: A case study at Trinh Hoai Duc Primary School. 知识学习与科学技术期刊 ISSN：2959-6386（在线）. 3, 2 (6月 2024), 143–161. DOI:https://doi.org/10.60087/jklst.vol3.n2.p161.