Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
trinh cua » tinh cua, trinh luat, trinh luan
hang cong » dang cong, hang nong, bang cong
ban than » ban thanh, van thanh, ban hang
van than » van thanh, van thang, van tuan

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

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