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, hanh trinh, minh trang
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
toan ban » van ban
va dung » van dung, va duong, vat dung

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