Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu tach » chiet tach, chieu sach, chiu trach
trung ha » trung hoc, trung tam, trung cap
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap
tung ha » dung ha, tung ho, tang ha

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 tach - thanh ((tung ha) or (trung ha)) nhung ((cong dan) OR (cong tan)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu tach - thanh ((tung ha) OR (trung ha)) nhung ((cong dan) OR (cong tan)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tach - thanh ((tung ha) or (trung ha)) nhung ((cong dan) OR (cong tan)) than cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu tach - thanh ((tung ha) or (trung ha)) nhung ((cong dan) OR (cong tan)) than cau*.