Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu xanh » hieu manh, hieu nganh, dieu hanh
dung cong » dung trong
cong san » cong tac
cong va » dong va, cong ha, cong tac
va dung » van dung, va duong, vat dung
hang ca » hang va, hang tai, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) OR (chieu xanh)) - thanh cong va dung cong san ((nang cao) or (hang ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - thanh cong va dung cong san ((nang cao) OR (hang ca)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (chieu xanh)) - thanh cong va dung cong san ((nang cao) or (hang ca))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (chieu xanh)) - thanh cong va dung cong san ((nang cao) or (hang ca))*.