HOANG LAM, P. T.; NGUYEN THI, C. A. The Impacts of Problem-Based Learning on Grammar Knowledge of Grade 11 Students at a High School in Vietnam. TTU Journal of Science, [S. l.], v. 1, n. 3, p. 71–79, 2026. DOI: 10.53901/tjs.2026.v01.issue03.art08. Disponível em: https://tjs.ttu.edu.vn/index.php/tjs/article/view/tjs.2026.v01.issue03.art08. Acesso em: 20 oct. 2026.