Ngo Huynh Hong Nga et al. 2026. VIETNAMESE TERTIARY EFL LECTURERS’ RESEARCH ENGAGEMENT FOR PROFESSIONAL DEVELOPMENT: AN ANDRAGOGICAL PERSPECTIVE. HNUE Journal of Science: Journal of Educational Science. 71, 6 (Sep. 2026), 13–22. DOI:https://doi.org/10.18173/2354-1075.2026-%x.