Perhaps you should try some spelling variations:
phuong thong » phuong trong, thong thong, phuong hoang
nhanh thang » nhanh thanh, nhanh quang, hanh trang
nhanh lang » nhanh quang, nhan dang, nhanh dong
thong doan » thong dan, trong doanh, thong hoang
va phuong » va thuong, cac phuong
nho hieu » nha hieu, nho sieu, nhu hieu
doan van » doan va, hoang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho hieu qua - ((nhanh lang) or (nhanh thang)) va phuong thong doan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu qua - ((nhanh lang) OR (nhanh thang)) va phuong thong doan van ban*.