Perhaps you should try some spelling variations:
hanh dung » thanh dung, anh dung, hanh dong
doc hieu » hoc thieu, hoc hien
dung dat » dung va, dung tai
dat cong » dai cong, dam cong, bat cong
cong dot » cong mot, cong dong, cong doan
dot van » do van, doi van, doan 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: ((doc hieu) or (toc thieu)) tinh - hanh dung dat cong dot van dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) tinh - hanh dung dat cong dot van dan ca.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) tinh - hanh dung dat cong dot van dan ca*.