Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
quang cong » quang cuong, quang dong, quang hoang
doi chieu » doc hieu, doi chi, ho chieu
trung dat » trong dat, trung dam, truong dai
trung dai » truong dai, truong dao, trung tam
cong san » cong tac
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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 ((trung dat) OR (trung dai)) quang cong san ((than cap) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung dat) or (trung dai)) quang cong san ((than cap) OR (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung dat) or (trung dai)) quang cong san ((than cap) OR (khan cap))*.