Perhaps you should try some spelling variations:
phuong cong » phuong dong, phung cong, phuong hoang
nhanh lang » nhanh quang, nhanh thang, nhan dang
phong cong » phong chong, thong cong, chong cong
hieu quan » hieu qua, lieu quan, thien quan
ho hieu » ho chieu, hoi hieu, nho hieu
lang ha » long ha
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu quan - nhanh lang ha ((phuong cong) or (phong cong)) dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quan - nhanh lang ha ((phuong cong) OR (phong cong)) dan van ban.
• Adding a wildcard symbol may retrieve word variants: ho hieu quan - nhanh lang ha ((phuong cong) or (phong cong)) dan van ban*.