Perhaps you should try some spelling variations:
phuong thong » phuong trong, thong thong, phuong hoang
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
va phuong » va thuong, cac phuong
doanh van » doan van, doanh va, doanh ban
danh van » dinh van, anh van, canh van
dang van » hoang van, hang va
ho hieu » ho chieu, hoi hieu, nho hieu
tung va » trung va, tuong va, dung va

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 hieu quang - thanh tung va phuong thong ((((danh van) OR (doanh van))) OR (dang van)) ban~.
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - thanh tung va phuong thong ((((danh van) or (doanh van))) or (dang van)) ban*.