NGUYỄN , Duy. A SURVEY OF QUESTION TYPES IN ELEMENTARY-LEVEL VIETNAMESE LANGUAGE TEXTBOOKS FOR FOREIGN LEARNERS: FREQUENCY OF OCCURRENCE AND EXPLANATION OF STRUCTURE AND MEANING. HCMUE Journal of Science, [S. l.], v. 22, n. 6, 2025. Disponível em: https://journal.hcmue.edu.vn/index.php/hcmuejos/article/view/5061. Acesso em: 15 jul. 2025.