Perhaps you should try some spelling variations:
dbenh nhan » doanh nhan, danh nhan, benh phan
dong dang » duong dang, dong bang, dung dang
doc hieu » toc thieu, hoc thieu, hoc hien
dang van » hoang van, hang va
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
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) or (doc hieu)) xanh - ((benh nhan) or (dbenh nhan)) van dong dang van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chi) OR (doc hieu)) xanh - ((benh nhan) OR (dbenh nhan)) van dong dang van toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (doc hieu)) xanh - ((benh nhan) or (dbenh nhan)) van dong dang van toan cao*.