Perhaps you should try some spelling variations:
hieu quan » hieu qua, lieu quan, thien quan
dung cong » dung trong
nhu hieu » nhu hien, nha hieu, nho hieu
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
rang va » hang va, bang va, dang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: nhu hieu quan - banh ((rang va) or (trang va)) dung cong dan ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhu hieu quan - banh ((rang va) OR (trang va)) dung cong dan ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: nhu hieu quan - banh ((rang va) or (trang va)) dung cong dan ((toan tai) or (toan ban))*.