NGUYỄN DANH VU 2024. INTRODUCTION OF PH.D THESIS BY NGUYEN DANH VU “POLITENESS AS AN ASPECT OF LINGUISTICS AND CULTURE AND SOME COMMUNICATIVE MEANS IN VIETNAMESE”. Journal of Foreign Language Studies. 07 (Dec. 2024), 69–70. DOI:https://doi.org/10.56844/tckhnn.07.311.