Perhaps you should try some spelling variations:
dang cong » dung cong
doc hieu » hoc thieu, hoc hien
canh van » anh van, can van, cach van
cua dang » cua cong, cua ban
tac phan » tac pham, tai phan, cac phan
tac phat » tac pham, tam phat, tan phat
van cua » vang cua, ban cua, dan cua

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 cua dang cong ((tac phan) OR (tac phat)) lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (toc thieu)) xanh - canh van cua dang cong ((tac phan) OR (tac phat)) lap~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) xanh - canh van cua dang cong ((tac phan) OR (tac phat)) lap*.