Chamnan Sok, Kosal Thay, Sovantha Ros, Phyny Sin, Tonghor Hab, & Sarom Mok. (2026). Focused Leadership Influencing the Development, Effectiveness and Sustainability of Professional Learning Communities: Evidence from TVET Institutions in Cambodia. Daengku: Journal of Humanities and Social Sciences Innovation, 6(4). https://doi.org/10.35877/454RI.daengku5108