Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hanh dung » thanh dung, anh dung, hanh dong
dung dan » dung dat, dung san, tung dan
dan cong » dang cong, van cong, dan dong
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van
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 - hanh dung dan cong tan van dan ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (toc thieu)) tinh - hanh dung dan cong tan van dan ca".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (toc thieu)) tinh - hanh dung dan cong tan van dan ca*.