Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc nhanh » hoc nganh, hoc phan
chung hoc » trung hoc, dung hoc, hung hoa
hoi doanh » hoa doanh, voi doanh, doi doanh
cach hoc » cach thuc, cach thoi, dich hoc
hung hoc » khung hoc, nhung hoc, dung hoc
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 ((hung hoc) OR (chung hoc)) xa hoi doanh nhan dan~.
• Adding a wildcard symbol may retrieve word variants: co cach hoc tap, nghien huu co hoc nhanh ((hung hoc) or (chung hoc)) xa hoi doanh nhan dan*.