Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, anh tang, hanh mang
hang cong » dang cong, hang nong, bang cong
tang cua » mang cua, hang cua, tang luan
cua hang » cua dang, cua nhung, cua cong
cong san » cong tac
toan cao » toan ban
toan tap » toan 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 - hanh tang cua hang cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh tang cua hang cong san ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh tang cua hang cong san ((toan cao) or (toan tap))*.