Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chieu » doc hieu, doi chi, mot chieu
bang cong » dang cong, bang song, hang cong
ho chieu » theo chieu, hoc thieu, mot chieu
tranh va » tranh van, trang va, trinh va
cong san » cong tac
toan cao » toan ban
toan tap » toan ban
va bang » va nang, va lang, va 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 - hanh tranh va bang cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - hanh tranh va bang cong san ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (ho chieu)) xanh - hanh tranh va bang cong san ((toan cao) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (ho chieu)) xanh - hanh tranh va bang cong san ((toan cao) or (toan tap))*.