Perhaps you should try some spelling variations:
doi chieu » doi chi, ho chieu, mot chieu
tranh cua » doanh cua, manh cua
nong cong » cong cong, tong cong, nang cong
doc hieu » toc thieu, hoc thieu, hoc hien
cua nong » cua cong, cuu nong, cua dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
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: ((doi chieu) OR (doc hieu)) xanh - canh tranh cua nong cong tan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - canh tranh cua nong cong tan ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - canh tranh cua nong cong tan ((toan cau) or (toan ban))*.