Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
thieu hach » thien hach, chieu sach, hieu cach
doanh luan » doanh nhan
hoc thieu » toc thieu, hoc hien
dong cong » duong cong, dang cong, cong cong
dung cong » dung trong
thanh can » thanh san, thanh van, thanh tan
can ban » van ban, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu hach - doanh doanh luan ((dong cong) or (dung cong)) thanh can ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu hach - doanh doanh luan ((dong cong) OR (dung cong)) thanh can ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - doanh doanh luan ((dong cong) or (dung cong)) thanh can ban*.