Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
tranh vat » trinh vat, tranh va, tranh van
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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