Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
lang cong » dang cong, bang cong, hang cong
tang van » dang van, hoang van, trong van
cong dan » cong san, cong tan, huong dan
than man » thanh san, tran manh, than phan
tang va » trang va, thang va, tang vat
than ma » than va, khan ma, nhan ma

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