Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tran » hanh trang, thanh tran, hanh tram
van trong » van truong, vang trong, ban trong
thanh cac » hanh cac, thanh bac, thanh ca
tran van » luan van
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chieu tinh)) - hanh tran van trong ((cong dan) or (cong tan)) thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu tinh)) - hanh tran van trong ((cong dan) OR (cong tan)) thanh cac.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu tinh)) - hanh tran van trong ((cong dan) or (cong tan)) thanh cac*.