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
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
hoi benh » hoc benh, hoa benh, hoi binh
nhan dan » phan dau, gian dan, nhan tai
bac hoc » bai hoc, bac ho
tu bac » tu ban, tu cac, tu bat
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: tu bac hoc tap, nghien cac cong hoc nganh hoa hoc xa hoi benh ((nhan dan) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bac hoc tap, nghien cac cong hoc nganh hoa hoc xa hoi benh ((nhan dan) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: tu bac hoc tap, nghien cac cong hoc nganh hoa hoc xa hoi benh ((nhan dan) or (phan tu))*.