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Thanh Hue H, Thi Loan B. DIFFICULTIES IN EDUCATIONAL ACTIVITIES OF SECONDARY SCHOOL TEACHERS IN THE NORTHERN MIDLANDS AND MOUNTAINOUS PROVINCES. HNUE Journal of Science: Educational Science [Internet]. 2025 Jan. 28 [cited 2025 Sep. 12];70(1):101-12. Available from:
https://hnuejs.edu.vn/es/article/view/409