Chamnan Sok, Kosal Thay, Sovantha Ros, Phyny Sin, Tonghor Hab, and 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.