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, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, khoan cam

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) OR (cong tan)) khan cap~.
• 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) OR (cong tan)) khan cap.
• 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) OR (cong tan)) khan cap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh tung ((cap hang) or (can bang)) ((cong dan) OR (cong tan)) khan cap*.