Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc nhanh » hoc nganh, hoc phan
cdung hoc » chung hoc, trung hoc, dong hoc
danh nhan » doanh nhan, thanh nhan, benh nhan
cach hoc » cach thuc, cach thoi, dich hoc
dung hoc » dong hoc, dung thuoc, trung hoc
hoi danh » hop danh, hoi dan, hoc danh
nhan dan » phan dau, gian dan, nhan tai
co cach » co cac, co sach, ca cach

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: co cach hoc tap, nghien huu co hoc nhanh ((dung hoc) OR (cdung hoc)) xa hoi danh nhan dan~.
• Adding a wildcard symbol may retrieve word variants: co cach hoc tap, nghien huu co hoc nhanh ((dung hoc) or (cdung hoc)) xa hoi danh nhan dan*.