Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, ho chieu, mot chieu
bang cong » dang cong, bang song, hang cong
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
doi chi » doi khi
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 (doi chi)) xanh - canh trinh va bang cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - canh trinh va bang cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - canh trinh va bang cong dan toan cao*.