Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
hop doanh » hop danh, hoa doanh, nhap doanh
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
khoa hoc » hoa hoc
so sach » so sanh, bo sach, co sach
nhan va » nhan tai, nhan dan, nhan tao
va hop » va hoc, va hoa, va hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach hoc tap, nghien cuu cong ((hoc nganh) or (hoc dan)) khoa hoc va hop doanh nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu cong ((hoc nganh) OR (hoc dan)) khoa hoc va hop doanh nhan va.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu cong ((hoc nganh) or (hoc dan)) khoa hoc va hop doanh nhan va*.