Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
doanh cua » doanh luan
tang luan » dung luan
ban than » ban thanh, van thanh, ban hanh
ban hang » ngan 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 thieu khang - hanh ((doanh cua) OR (tang luan)) nhung cong ((ban than) OR (ban hang)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu khang - hanh ((doanh cua) or (tang luan)) nhung cong ((ban than) OR (ban hang)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - hanh ((doanh cua) or (tang luan)) nhung cong ((ban than) OR (ban hang)) cau*.