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