Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
manh hung » anh huong
cua thong » cua thuong, cua khong, cua tong
hung cua » huong cua, chung cua, khung cua
cong tan » cong tac, cong san, cong ty
toan ban » van ban

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 - manh hung cua thong ((cong thanh) OR (cong tan)) toan ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - manh hung cua thong ((cong thanh) or (cong tan)) toan ban*.