Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
tranh qua » tranh cua, thanh qua, trinh qua
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban

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 (ho chieu)) xanh - canh tranh qua dung cong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - canh tranh qua dung cong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) xanh - canh tranh qua dung cong dan ((toan cao) or (toan ban))*.