Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
nhan dang » nhan dan, phan dang, tran dang
dang dung » dan dung, dang hung, dang quang
dung ung » dung cong
ung dong » vung dong, dung dong, nung dong
dong van » duong van, dang van, dong von
van dan » van ban, ban dan, van dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (toc thieu)) tinh - nhan dang dung ung dong van dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) tinh - nhan dang dung ung dong van dan ca.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) tinh - nhan dang dung ung dong van dan ca*.