Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu quan » hieu qua, lieu quan, thien quan
hoi hieu » hoi phieu, hoi tieu, moi hieu
tranh va » tranh van, trinh va, thanh va
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu quan - canh ((tranh va) OR (trang va)) nhung cong dan ((toan ban) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu quan - canh ((tranh va) OR (trang va)) nhung cong dan ((toan ban) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoi hieu quan - canh ((tranh va) OR (trang va)) nhung cong dan ((toan ban) OR (toan tap))*.