Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach hoi » sach doi, sach moi, cach thoi
dong hoc » dong co, dong luc
khoa hoc » hoa hoc
nhan tao » nhan tai, nhan dan
tu sach » thu sach, su sach, te sach
mon hoc » toan hoc
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoi dap, nghien cuu ((mon hoc) OR (dong hoc)) nganh khoa hoc xa hoi ca nhan tao~".
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien cuu ((mon hoc) OR (dong hoc)) nganh khoa hoc xa hoi ca nhan tao*.