Bui TA, Ho D-CT, Nguyen CH, Phan HN, Nguyen LY. Text mining in the trend of education 4.0: A study on clustering mathematical terms of algebra textbooks in Vietnamese high schools. VJE [Internet]. 2020 Dec. 30 [cited 2024 Apr. 19];4(4):59-68. Available from: https://vje.vn/index.php/journal/article/view/81