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
quan nhung » qua nhung, cua nhung, quang hung
luan chung » luan chinh
cong dan » cong san, cong tan, huong dan
chan man » chan nan, than man, chan dang
doan » doanh, toan, soan

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) or (luan chung)) cong dan ((chan man) OR (chan doan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh trinh ((quan nhung) OR (luan chung)) cong dan ((chan man) OR (chan doan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh trinh ((quan nhung) or (luan chung)) cong dan ((chan man) OR (chan doan))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh trinh ((quan nhung) or (luan chung)) cong dan ((chan man) OR (chan doan))*.