Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
phan dan » phan dang, phan dau, nhan dan
dan dung » van dung, tin dung, ap dung
cong dan » cong san, cong tan, huong dan
van nang » van quang, van ban, van dong
dan van » dang van, doan van, dao van
nang ca » nang cao, nang cap, nang cua

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 - phan dan dung cong dan van nang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) tinh - phan dan dung cong dan van nang ca.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) tinh - phan dan dung cong dan van nang ca*.