Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hanh mang » nhanh mang, hanh trang, nhanh lang
hang cong » dang cong, hang nong, bang cong
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, tra cau
mang va » mang vua, hang va, bang va
va hang » van hang, va nang, va lang
ran cau » van cau, ban cau, can cau

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 mang va hang cong tan ((tran cau) or (ran cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh mang va hang cong tan ((tran cau) OR (ran cau)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh mang va hang cong tan ((tran cau) or (ran cau))*.