Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
canh doanh » hanh doanh, chinh doanh, doanh doanh
thong cong » trong cong, tong cong, thong thong
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
van thanh » van tuan
ban thanh » ban hanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) OR (chiet tach)) - canh doanh cua thong cong ((van thanh) or (ban thanh)) toan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - canh doanh cua thong cong ((van thanh) OR (ban thanh)) toan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (chiet tach)) - canh doanh cua thong cong ((van thanh) or (ban thanh)) toan".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (chiet tach)) - canh doanh cua thong cong ((van thanh) or (ban thanh)) toan*.