Perhaps you should try some spelling variations:
duong phong » duong hong, duong trong, duong cong
hieu lang » chieu sang, hieu quang, nhieu tang
doanh qua » doanh quan, doanh cua, danh qua
doan quan » doan quang, dan quan, toan quan
phong van » phung van, thong van, phong va
van thanh » ban thanh, van tuan
thanh tap » thanh lap, thanh tai, thanh tay
hoi hieu » hoi phieu, hoi tieu, moi hieu

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 lang - hanh ((doanh qua) or (doan quan)) duong phong van thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh ((doanh qua) OR (doan quan)) duong phong van thanh tap.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh ((doanh qua) or (doan quan)) duong phong van thanh tap*.