Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, hieu van
cua nhung » va nhung
tung cua » trung cua, tuong cua, dung cua
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan tap » toan ban

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

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