Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh va » tranh van, trinh va, thanh va
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan

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: ho ((chieu sach) OR (hieu lang)) - canh ((tranh va) OR (trang va)) nhung cong dan phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (hieu lang)) - canh ((tranh va) OR (trang va)) nhung cong dan phan tu~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu lang)) - canh ((tranh va) OR (trang va)) nhung cong dan phan tu*.