Perhaps you should try some spelling variations:
nhanh dang » nhan dang, nhanh dong, nhanh lang
dang dang » dang dung, dung dang, dang bang
dang cong » dung cong
cong danh » cuong danh, cong dan, cong thanh
doc hieu » hoc thieu, hoc hien
danh van » doanh van, dang van, dinh van
ban ca » ban cua, ban can, ban cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) tinh - nhanh dang dang cong danh van ban ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) tinh - nhanh dang dang cong danh van ban ca.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) tinh - nhanh dang dang cong danh van ban ca*.