Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
lieu tinh » trieu tinh, diep tinh, bien tinh
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((lieu tinh) or (nhieu tang)) - canh tranh va dung cong tan ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((lieu tinh) OR (nhieu tang)) - canh tranh va dung cong tan ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi ((lieu tinh) or (nhieu tang)) - canh tranh va dung cong tan ((toan tap) or (toan ban))*.