Perhaps you should try some spelling variations:
thuyet dinh » thuyet kinh, thuyet minh, thuyet tinh
dinh doanh » kinh doanh, minh doanh, chinh doanh
nghiep tu » nghiep vu, nghiep vua, nghiep cua
manh toan » thanh toan, tinh toan
nghe duoc » nghiem duoc, nghe nuoi, che duoc
duoc hoc » quoc hoi
tu hoc » te hoc

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: (( thuyet dinh doanh nghiep tu hoc ) OR ( tu ((manh toan) OR (anh tuan)) nghe duoc hoc ))~.
• Adding a wildcard symbol may retrieve word variants: (( thuyet dinh doanh nghiep tu hoc ) or ( tu ((manh toan) or (anh tuan)) nghe duoc hoc ))*.