Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
cach hoc » cach thuc, cach thoi, dich hoc
khoa hoc » hoa hoc
tu cach » tu cac
va nhan » van nhan, va phan, va nha
mo hoc » mon hoc, co 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: tu cach hoc tap, nghien cuu mo hoc doanh khoa hoc xa hoi ((va nhan) or (ca nhan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghien cuu mo hoc doanh khoa hoc xa hoi ((va nhan) OR (ca nhan)) van.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien cuu mo hoc doanh khoa hoc xa hoi ((va nhan) or (ca nhan)) van*.