Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chung cong » nhung cong, chong cong, phung cong
trinh thi » trinh tai, dinh thi, trinh tin
ban thanh » ban hanh, ban hang
thanh cap » thanh lap, hanh cap, than cap
ho chieu » theo chieu, hoc thieu, doi chieu
trinh tu » trinh ky
trinh do » trinh ky
cong ban » cong bang, cong san, cong tan

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) OR (trinh do)))) chung cong ban thanh cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trinh thi) or (((trinh tu) OR (trinh do)))) chung cong ban thanh cap~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trinh thi) or (((trinh tu) OR (trinh do)))) chung cong ban thanh cap*.