Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
thi chieu » thi chien, thi hieu, theo chieu
cuong tap » luong tap, cong tac, luong tai
tranh va » tranh van, trang va, trinh va
cong tap » cong tac, cong tan, tong tap
va dung » van dung, va duong, vat dung
quan ha » quan he

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