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