Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
tam toan » tap toan, pham toan, tam thanh
tam than » ban than

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 tang) OR (hanh mang)) cua dong cong ((tam toan) OR (tam than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((hanh tang) OR (hanh mang)) cua dong cong ((tam toan) or (tam than)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((hanh tang) OR (hanh mang)) cua dong cong ((tam toan) or (tam than)) cau*.