Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac

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: hoc chieu sach - hanh trang cua nhung ((cong tan) OR (cong san)) ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh trang cua nhung ((cong tan) or (cong san)) ((toan ban) OR (van ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trang cua nhung ((cong tan) or (cong san)) ((toan ban) OR (van ban))*.