Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
chung nhan » chung khoan, dung nhan, chung nam
hoc doanh » hoa doanh, hoc danh, hoc dan
chuc nhan » thuc nhan, chuc nganh, thuoc nhan
cach hoc » cach thuc, cach thoi, dich hoc
khoa hoc » hoa hoc
su cach » su sach, tu cach, su cac
cua han » cua hang, cua nhan, cua phan
han hoc » nhan hoc, than hoc, van hoc
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach hoc tap, nghien cua han hoc doanh khoa hoc xa hoi ((chuc nhan) or (chung nhan)) dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach hoc tap, nghien cua han hoc doanh khoa hoc xa hoi ((chuc nhan) OR (chung nhan)) dan.
• Adding a wildcard symbol may retrieve word variants: su cach hoc tap, nghien cua han hoc doanh khoa hoc xa hoi ((chuc nhan) or (chung nhan)) dan*.