Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
trong dan » trong dang, trong san, trong tan
tranh va » tranh van, trang va, trinh va
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
doi chi » doi khi
va dung » van dung, va duong, vat dung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chi) or (theo chieu)) tinh - canh tranh va dung trong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chi) OR (theo chieu)) tinh - canh tranh va dung trong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (theo chieu)) tinh - canh tranh va dung trong dan toan cao*.