Perhaps you should try some spelling variations:
khoi nganh » hoc nganh, moi nganh
nganh khoa » nganh hoa, nganh khong, doanh khoa
cong khoi » cong khi, cong nhoi, tong khoi
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
khoa hoc » hoa hoc
hoi benh » hoc benh, hoa benh, hoi binh
nhan van » nhan va, phan van, nha van
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 khoi nganh khoa hoc xa hoi benh ((nhan van) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu cong khoi nganh khoa hoc xa hoi benh ((nhan van) OR (nhan dan)).
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu cong khoi nganh khoa hoc xa hoi benh ((nhan van) or (nhan dan))*.