Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
trung cad » trung cap, trung ca, trung can
trung van » truong van, trong van, trung va
bac thanh » ban thanh, cac thanh, tai thanh
thanh chu » thanh chau, thanh cha, thanh thu
cong bac » cong tac, dong bac, cong 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 - thanh ((trung cad) or (trung van)) trong cong bac thanh chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - thanh ((trung cad) OR (trung van)) trong cong bac thanh chu.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - thanh ((trung cad) or (trung van)) trong cong bac thanh chu*.