Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
cap hang » cap hoang, cap bang, cap han
can bang » cao bang, can ban, van ban
cong dan » cong san, cong tan, huong dan
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh tung ((cap hang) or (can bang)) cong dan ((khan cap) OR (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh tung ((cap hang) OR (can bang)) cong dan ((khan cap) OR (khan ap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh tung ((cap hang) or (can bang)) cong dan ((khan cap) OR (khan ap))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh tung ((cap hang) or (can bang)) cong dan ((khan cap) OR (khan ap))*.