Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung tam, tran tuan, truong thanh
hoc chieu » hoc thieu, ho chieu, hoc hien
trung vap » trung cap, trung va, trung van
trong van » trong cac
van than » van thanh, van thang, van tuan
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh ((trung vap) or (((trung tuan) or (trung thanh)))) dung trong van than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trung vap) OR (((trung tuan) OR (trung thanh)))) dung trong van than cap.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trung vap) or (((trung tuan) or (trung thanh)))) dung trong van than cap*.