Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
luan cong » luat cong, luong cong, luan chung
cong cong » cong dong, trong cong, dung cong
anh dung » anh dong, anh huong, sach dung
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - anh dung luan cong cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - anh dung luan cong cong san ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - anh dung luan cong cong san ((toan cao) or (toan ban))*.