Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hanh dung » thanh dung, anh dung, hanh dong
dung danh » dung doanh, dung dan, cuong danh
danh cong » dang cong, hanh cong, anh cong
cong so » cong san, cong hoa
van dan » van ban, ban dan, van dao
so van » su van, vo van

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 - hanh dung danh cong so van dan ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (toc thieu)) tinh - hanh dung danh cong so van dan ca".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (toc thieu)) tinh - hanh dung danh cong so van dan ca*.