Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
manh toan » thanh toan, anh tuan, tinh toan

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 - hanh ((trung cua) OR (trung cap)) nhung cong ((manh toan) OR (dan gian)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((trung cua) OR (trung cap)) nhung cong ((manh toan) or (dan gian)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trung cua) OR (trung cap)) nhung cong ((manh toan) or (dan gian)) cau*.