Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
hoa nganh » hoc nganh, khoi nganh, hoa doanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sanh doi » sach doi, thanh doi, tinh doi
cac cong » cua cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan dan » phan dau, gian dan, nhan tai
so sanh » do sanh
doi tai » hoi tai, dai tai, doi tac
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 sanh doi tai, nghien cac cong hoa nganh hoa hoc xa hoi dan ((nhan dan) OR (dung tai))~.
• Adding a wildcard symbol may retrieve word variants: so sanh doi tai, nghien cac cong hoa nganh hoa hoc xa hoi dan ((nhan dan) or (dung tai))*.