Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach moi » sach doi, sach hoi, bach mai
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
nhan dan » phan dau, gian dan, nhan tai
so sach » so sanh, bo sach, co sach
moi tac » doi tac, moi tai, moi sach
hoi dan » hoa dan, hoc dan, hoi dap
hoc xa » hoc ma

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 moi tac, nghien cac cong hoc nganh hoa hoc xa hoi dan ((nhan dan) OR (dung tai))~.
• Adding a wildcard symbol may retrieve word variants: so sach moi tac, nghien cac cong hoc nganh hoa hoc xa hoi dan ((nhan dan) or (dung tai))*.