Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
huong cua » dung cua
dong cong » duong cong, dung cong, dang cong
chang dam » chang ham, hang dam, hang dau
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh
than cap » khan cap, thanh lap, thanh cac
rang ham » lang ha, hang hai

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 - anh huong cua dong cong tan ((than cap) or (((chang dam) or (rang ham))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - anh huong cua dong cong tan ((than cap) OR (((chang dam) OR (rang ham)))).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - anh huong cua dong cong tan ((than cap) or (((chang dam) or (rang ham))))*.