Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » thong cong, hang cong, nhung don
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
cong cua » cong cu, dong cua, huong cua
than cau » toan cau, phan cau, than cap
phan dau » phan tu, hang dau

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 - thanh cong cua ((nhung cong) or (dung cong)) dan ((than cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh cong cua ((nhung cong) OR (dung cong)) dan ((than cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh cong cua ((nhung cong) or (dung cong)) dan ((than cau) or (phan dau))*.