Perhaps you should try some spelling variations:
hieu sang » chieu sang, hieu lang, hieu quang
huong cua » dung cua
doc hieu » toc thieu, hoc thieu, hoc hien
cua dang » cua cong, cua ban
cong dan » cong tan, huong dan, cong dong
cong tac » cong ty
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sang - anh huong cua dang ((((cong dan) or (cong tac))) or (cong san)) khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - anh huong cua dang ((((cong dan) OR (cong tac))) OR (cong san)) khan cap.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - anh huong cua dang ((((cong dan) or (cong tac))) or (cong san)) khan cap*.