Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
hieu sach » chieu sach, hieu cach, dien sach
tuong dai » truong dai, tuong lai, duong dai
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
dai dung » dai duong, dan dung, mai dung
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
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: doc hieu sach - thanh tuong dai dung cong san ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - thanh tuong dai dung cong san ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - thanh tuong dai dung cong san ((toan cau) or (toan cao))*.