Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat
dong thanh » truong thanh
quan hoang » luan hoan
trinh cua » tinh cua, trinh luat, trinh luan
hang dong » hang nong, hang cong, hanh dong
ho chieu » theo chieu, hoc thieu, doi chieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh ((trinh cua) OR (trinh quan)) hang dong thanh ((quan hoang) or (trinh han))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh cua) OR (trinh quan)) hang dong thanh ((quan hoang) OR (trinh han)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trinh cua) OR (trinh quan)) hang dong thanh ((quan hoang) or (trinh han))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh cua) OR (trinh quan)) hang dong thanh ((quan hoang) or (trinh han))*.