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