Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tranh cua » manh cua
doanh cua » doanh luan
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

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 chiet tach - canh ((tranh cua) OR (doanh cua)) nhung cong ((dan than) OR (ban than)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - canh ((tranh cua) or (doanh cua)) nhung cong ((dan than) OR (ban than)) ban~".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - canh ((tranh cua) or (doanh cua)) nhung cong ((dan than) OR (ban than)) ban*.