Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tap » toan ban
va nang » van nang, cam nang, kha nang
da nang » cam nang, kha nang, cao nang

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 trang ((va nang) or (da nang)) ((cong dan) OR (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh trang ((va nang) OR (da nang)) ((cong dan) OR (cong san)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh trang ((va nang) or (da nang)) ((cong dan) OR (cong san)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh trang ((va nang) or (da nang)) ((cong dan) OR (cong san)) toan tap*.