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
danh nhan » doanh nhan, thanh nhan, benh nhan
cach hoc » cach thuc, cach thoi, dich hoc
hung hoc » khung hoc, nhung hoc, dung hoc
hoi danh » hop danh, hoi dan, hoc danh
nhan van » nhan dan, nhan va, phan van
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 danh nhan van~.
• Adding a wildcard symbol may retrieve word variants: co cach hoc tap, nghien huu co hoc nhanh ((hung hoc) or (chung hoc)) xa hoi danh nhan van*.