Van Khanh P, Vu Anh Tuan P. BUILDING A VIETNAMESE MATH CHATBOT BASED ON RAG AND LLM: SYSTEM DESIGN, IMPLEMENTATION AND EXPERIMENTAL EVALUATION. HNUEJS.NS [Internet]. 2025 Dec. 30 [cited 2026 Jan. 9];70(4):43-56. Available from: https://hnuejs.edu.vn/ns/article/view/1284