Perhaps you should try some spelling variations:
doi chieu » doi chi, ho chieu, mot chieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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: ((doi chieu) OR (doc hieu)) sang - canh tranh cua nhung ((cong dan) OR (cong san)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) sang - canh tranh cua nhung ((cong dan) or (cong san)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) sang - canh tranh cua nhung ((cong dan) or (cong san)) toan cao*.