Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
cong san » cong tac
toan tap » toan ban
va dung » van dung, va duong, vat dung
sai lap » sai lam, sang lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - canh tranh va dung cong san ((((sai lap) or (bai tap))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh tranh va dung cong san ((((sai lap) OR (bai tap))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh tranh va dung cong san ((((sai lap) or (bai tap))) or (toan tap))*.