Casinillo, L.F. et al. 2024. Understanding stress and satisfaction of private teachers: A correlation analysis and K-means clustering. HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - SOCIAL SCIENCES. 15, 4 (May 2024), 112–126. DOI:https://doi.org/10.46223/HCMCOUJS.soci.en.15.4.3205.2025.