Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
coc nganh » hoc nganh, cac nganh, chuc nganh
danh nhan » doanh nhan, thanh nhan, benh nhan
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
so sach » so sanh, bo sach, co sach
ma hop » mau hop, va hop

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu cong coc nganh khoa hoc ((ma hop) OR (ma hoa)) danh nhan dan~.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu cong coc nganh khoa hoc ((ma hop) or (ma hoa)) danh nhan dan*.