Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hanh tung » thanh tung, manh tung, hanh dung
cua thong » cua thuong, cua khong, cua tong
anh dang » anh dong, anh dung, anh bang
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
van tap » van tai, van tan, han tap

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 - ((hanh tung) or (anh dang)) cua thong ((cong tan) OR (cong tac)) van tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hanh tung) OR (anh dang)) cua thong ((cong tan) OR (cong tac)) van tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((hanh tung) or (anh dang)) cua thong ((cong tan) OR (cong tac)) van tap".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((hanh tung) or (anh dang)) cua thong ((cong tan) OR (cong tac)) van tap*.