Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
dang cong » dung cong
van hanh » van thanh, ban hanh, van anh
hanh lua » hanh luat, hanh sua, hanh cua
lua dang » cua dang, lua sang, luan nang
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) OR (chieu tinh)) - van hanh lua dang cong tan van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu tinh)) - van hanh lua dang cong tan van ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu tinh)) - van hanh lua dang cong tan van ban*.