Perhaps you should try some spelling variations:
khoa doanh » hoa doanh, cho doanh, khoa dang
cuu toan » cuu hoan, cua toan, huu toan
khoa hoc » hoa hoc
gian dan » gian lang
phan dau » phan tu, hang dau
tu sinh » thu sinh, tuc sinh, tu minh
hoi cua » hoi chuc
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: tu sinh hoc tap, nghien cuu toan khoa doanh khoa hoc xa hoi cua ((gian dan) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sinh hoc tap, nghien cuu toan khoa doanh khoa hoc xa hoi cua ((gian dan) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: tu sinh hoc tap, nghien cuu toan khoa doanh khoa hoc xa hoi cua ((gian dan) or (phan dau))*.