Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » hieu lang, nhiet nang
chieu sang » chieu sach, chieu xanh, hieu lang
thanh hung » thanh huong, thanh tung, manh hung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, 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 ((nhieu tang) or (chieu sang)) - thanh trung ((thanh hung) or (thanh cong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((nhieu tang) OR (chieu sang)) - thanh trung ((thanh hung) OR (thanh cong)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((nhieu tang) or (chieu sang)) - thanh trung ((thanh hung) or (thanh cong)) cong tac toan cau*.