Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, anh tang, hanh mang
tang cua » mang cua, hang cua, tang luan
cua hang » cua dang, cua nhung, cua cong
cong dan » huong dan, cong dong, cong tac
cong san » cong tac
cong tan » cong tac, cong thanh, cong ty
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 hang ((((cong dan) OR (cong san))) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh tang cua hang ((((cong dan) OR (cong san))) OR (cong tan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh tang cua hang ((((cong dan) OR (cong san))) or (cong tan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh tang cua hang ((((cong dan) OR (cong san))) or (cong tan)) toan cao*.