Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
chi tach » chiu trach, chiet tach, chi thanh
thong tu » phong tuc, thong tin, thong ke
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi tach - hanh ((thong tu) or (tang luan)) nhung cong ((tan toan) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi tach - hanh ((thong tu) OR (tang luan)) nhung cong ((tan toan) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chi tach - hanh ((thong tu) or (tang luan)) nhung cong ((tan toan) or (van toan)) cau*.