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