Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chong cong » cong cong, thong cong, cuong cong
trinh thi » trinh tai, dinh thi, trinh tin
van thanh » ban thanh, van tuan
ho chieu » theo chieu, hoc thieu, doi chieu
trinh tu » trinh ky, trinh do
ban than » ban thanh, ban hang, ban hanh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trinh thi) OR (trinh tu)) chong cong ((ban than) OR (van thanh)) cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trinh thi) or (trinh tu)) chong cong ((ban than) OR (van thanh)) cap~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trinh thi) or (trinh tu)) chong cong ((ban than) OR (van thanh)) cap*.