Perhaps you should try some spelling variations:
khoa doanh » hoa doanh, cho doanh, khoa dang
doanh hoan » doanh doanh, doanh khoa, doanh nhan
sach hoi » sach doi, sach moi, cach thoi
cuu toan » cuu hoan, cua toan, huu toan
hoan hoc » hoa hoc, toan hoc, hoang hoa
nhan tao » nhan tai, nhan dan
su sach » so sach, vu sach
hoi tap » hoi dap, hoc tap, hoi tai
nhan va » nhan tai, nhan dan, phan van
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: su sach hoi tap, nghien cuu toan khoa doanh hoan hoc xa hoi va ((nhan va) or (nhan tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tap, nghien cuu toan khoa doanh hoan hoc xa hoi va ((nhan va) OR (nhan tao)).
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, nghien cuu toan khoa doanh hoan hoc xa hoi va ((nhan va) or (nhan tao))*.