Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh ninh » thanh tinh, thanh vinh, thanh kinh
thanh binh » thai binh, than kinh, tinh binh
viet chung » viet hung, viet phuong, viet thuong
chung cong » nhung cong, chong cong, phung cong
doi chieu » doc hieu, doi chi, mot chieu
thanh lap » thanh san, phan lap, thanh hai
cong ban » cong bang, cong san, cong tan
than cap » khan cap, thanh cac, than cua

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: doi chieu sach - ((thanh ninh) OR (thanh binh)) viet chung cong ban ((than cap) OR (thanh lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((thanh ninh) OR (thanh binh)) viet chung cong ban ((than cap) or (thanh lap))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((thanh ninh) OR (thanh binh)) viet chung cong ban ((than cap) or (thanh lap))*.