Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
san thanh » ban thanh, van thanh, son thanh
thanh cao » thanh ca, thanh cac, thanh thao
ho chieu » theo chieu, hoc thieu, mot chieu
cong san » cong tac
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) OR (ho chieu)) xanh - ((canh tranh) or (hanh trinh)) va dung cong san thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - ((canh tranh) OR (hanh trinh)) va dung cong san thanh cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (ho chieu)) xanh - ((canh tranh) or (hanh trinh)) va dung cong san thanh cao*".