Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, ho chieu
trinh vat » trinh van, trinh luat, sinh vat
trong dan » trong dang, trong san, trong tan
vat dung » van dung, va dung, viet dung
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 (theo tieu)) tinh - canh trinh vat dung trong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo tieu)) tinh - canh trinh vat dung trong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo tieu)) tinh - canh trinh vat dung trong dan toan cao*.