Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
viet dung » viet hung, viet huong, viet trung
trong tac » trong cac, tuong tac, trong tan
vat dung » van dung, va dung, mat duong
tac phan » tac pham, tai phan, tac phat
phan cac » nhan cach, phan dau, phan lap

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 chieu)) sang - canh tranh ((vat dung) OR (viet dung)) trong tac phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chieu)) sang - canh tranh ((vat dung) OR (viet dung)) trong tac phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo chieu)) sang - canh tranh ((vat dung) OR (viet dung)) trong tac phan cac".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chieu)) sang - canh tranh ((vat dung) OR (viet dung)) trong tac phan cac*.