Bui, T. A., Ho, D.-C. T., Nguyen, C. H., Phan, H. N. and Nguyen, L. Y. (2020) “Text mining in the trend of education 4.0: A study on clustering mathematical terms of algebra textbooks in Vietnamese high schools”, Vietnam Journal of Education, 4(4), pp. 59–68. doi: 10.52296/vje.2020.81.