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 mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - hanh tang cua nhung ((cong dong) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh tang cua nhung ((cong dong) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh tang cua nhung ((cong dong) or (cong san)) toan cau*.