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
dong danh » dong doanh, dong anh, dung danh
tang cua » mang cua, hang cua, tang luan
dong dan » duong dan, dong san, cong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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