Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
thanh van » thanh san, thanh toan, thanh phan
khoa hoc » hoa hoc
bac hoc » bai hoc, bac ho
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
tu bac » tu ban, tu cac, tu bat
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 bac hoc tap, nghien cuu mon hoc doanh khoa hoc xa hoi ca ((thanh van) or (pham van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bac hoc tap, nghien cuu mon hoc doanh khoa hoc xa hoi ca ((thanh van) OR (pham van)).
• Adding a wildcard symbol may retrieve word variants: tu bac hoc tap, nghien cuu mon hoc doanh khoa hoc xa hoi ca ((thanh van) or (pham van))*.