Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hoan luan » hoa luan, toan luan, han luan
cong cong » cong dong, trong cong, dang 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: toc thieu tach - doanh hoan luan ((cong cong) or (dung cong)) thanh can ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu tach - doanh hoan luan ((cong cong) OR (dung cong)) thanh can ban.
• Adding a wildcard symbol may retrieve word variants: toc thieu tach - doanh hoan luan ((cong cong) or (dung cong)) thanh can ban*.