Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
tranh van » tran van, trinh van, thanh van
ho chieu » theo chieu, hoc thieu, mot chieu
van dung » van dong, xay dung, tin dung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - canh tranh van dung ((cong dan) OR (cong san)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) xanh - canh tranh van dung ((cong dan) OR (cong san)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - canh tranh van dung ((cong dan) OR (cong san)) toan ban*.