Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
nhan taon » nhan trong, nhan thong, nhan tuong
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
nhan tao » nhan tai, nhan dan
tu mach » tu cach, tu manh, tu hach
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: tu mach hoc tap, nghien cuu mo hoc nganh khoa hoc xa hoi va ((nhan taon) or (nhan tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu mo hoc nganh khoa hoc xa hoi va ((nhan taon) OR (nhan tao)).
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu mo hoc nganh khoa hoc xa hoi va ((nhan taon) or (nhan tao))*.