Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
cong tan » cong tac, cong san, cong thanh
toan cao » toan 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 hieu lang - thanh dung luan chung cong tan ((toan cao) or (((toan ban) OR (van ban))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh dung luan chung cong tan ((toan cao) OR (((toan ban) OR (van ban))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - thanh dung luan chung cong tan ((toan cao) or (((toan ban) OR (van ban))))*".