Perhaps you should try some spelling variations:
doanh khoa » toan khoa
nganh hoa » thanh hoa, khanh hoa, danh hoa
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
nhan dan » phan dau, gian dan, nhan tai
va nhan » van nhan, ca nhan, va phan
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: thu mach hoc tap, nghien cuu cong hoc ((doanh khoa) or (nganh hoa)) hoc xa hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu mach hoc tap, nghien cuu cong hoc ((doanh khoa) OR (nganh hoa)) hoc xa hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nghien cuu cong hoc ((doanh khoa) or (nganh hoa)) hoc xa hoi va nhan dan*.