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