1.
Wetchakama M, Tanunchaibutra P. The development of Vietnamese language supplementary courses in daily life for improvement of speaking ability using the 3ps approach to language teaching for grade 9 students . JDSC [internet]. 2023 Apr. 30 [cited 2026 Sep. 2];10(1):727-42. available from: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/261753