Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
cach hoc » cach thuc, cach thoi, dich hoc
cua dong » chua dong, cua cong, cua dang
dong hoc » dong co, dong luc
khoa hoc » hoa hoc
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
tu cach » tu cac
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach hoc tap, nghien cua dong hoc doanh khoa hoc xa hoi ca ((nhan dan) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach hoc tap, nghien cua dong hoc doanh khoa hoc xa hoi ca ((nhan dan) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien cua dong hoc doanh khoa hoc xa hoi ca ((nhan dan) OR (phan dau))*.