Binh, Hong Nguyet. “A Contrastive Study of Teaching and Learning Strategies of the Adverb of Range “都” and ‘đều’ in Chinese and Vietnamese”. Journal of English Language Teaching and Applied Linguistics , vol. 3, no. 6, June 2021, pp. 113-9, https://doi.org/10.32996/jeltal.2021.3.6.16.