Perhaps you should try some spelling variations:
dai trung » dai truong, tai trung, dac trung
hieu hien » bieu hien, dieu hien, chieu chien
dai truc » dai thuc, doan truc, cau truc
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
ly hang » ly quang
hang ma » hang va, hang ca, tang ma
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (bo sach)) ly hang ma hoa. hieu hien ((dai truc) OR (dai trung)) va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ly hang ma hoa. hieu hien ((dai truc) OR (dai trung)) va hanh vi cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (bo sach)) ly hang ma hoa. hieu hien ((dai truc) OR (dai trung)) va hanh vi cua vat*".