Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
canh manh » lanh manh, cach mang, van manh
dung cong » dung trong
san chang » ban hang, dan chan, van khang
cong san » cong tac
chang tu » chung tu, chang xu, hang tu
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 ((chieu xanh) or (chieu sang)) - ((canh manh) OR (canh tranh)) va dung cong san chang tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - ((canh manh) OR (canh tranh)) va dung cong san chang tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sang)) - ((canh manh) OR (canh tranh)) va dung cong san chang tu".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sang)) - ((canh manh) OR (canh tranh)) va dung cong san chang tu*.