Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
lanh manh » lanh tranh, lan anh, anh anh
cua nhung » va nhung
doi hieu » doi chieu, doc hieu, doi hien
van manh » van minh, van anh, van hanh
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - ((lanh manh) OR (van manh)) cua nhung ((cong tan) or (cong tac)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((lanh manh) OR (van manh)) cua nhung ((cong tan) OR (cong tac)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - ((lanh manh) OR (van manh)) cua nhung ((cong tan) or (cong tac)) than cau".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - ((lanh manh) OR (van manh)) cua nhung ((cong tan) or (cong tac)) than cau*.