Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
canh tran » canh tranh, hanh trang, banh trang
ho chieu » theo chieu, hoc thieu, mot chieu
tran van » luan van
van dung » van dong, xay dung, tin dung
cong dan » cong san, cong tan, cong dong
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 tran van dung ((cong dan) OR (huong dan)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) xanh - canh tran van dung ((cong dan) OR (huong dan)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - canh tran van dung ((cong dan) OR (huong dan)) toan ban*.