Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cap » khan cap, thanh lap, thanh cac
khan ap » khan cap, 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 - hanh trinh quan nhung ((cong dan) OR (cong tan)) ((khan ap) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh trinh quan nhung ((cong dan) OR (cong tan)) ((khan ap) OR (than cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh trinh quan nhung ((cong dan) OR (cong tan)) ((khan ap) or (than cap))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh trinh quan nhung ((cong dan) OR (cong tan)) ((khan ap) or (than cap))*.