Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
canh doanh » hanh doanh, chinh doanh, doanh doanh
nhung cong » dung cong, thong cong, hang cong
doanh cua » doanh luan
cua nhung » va nhung
tap toan » tap doan, tap quan, bai toan
van toan » van tuan, van tan, van thanh

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

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