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

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