Perhaps you should try some spelling variations:
dang cong » dung cong
doc hieu » hoc thieu, hoc hien
canh van » anh van, cach van, canh dan
cua dang » cua cong, cua ban
cong san » cong tac
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac
can van » cac van, can ban, tan van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) xanh - ((canh van) OR (can van)) cua dang cong san than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (toc thieu)) xanh - ((canh van) OR (can van)) cua dang cong san than cap~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) xanh - ((canh van) OR (can van)) cua dang cong san than cap*.