Perhaps you should try some spelling variations:
nganh tuong » nganh cong, manh tuong, nganh nong
hoc nganh » hoc nhanh
tuong hoc » truong hoc, tuong ho, duong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
hoi cac » hoc cac, voi cac, hoa cac
van tai » von tai, van tuan
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoc tap, nghien cuu cong hoc nganh tuong hoc ma hoi cac ((nhan dan) or (van tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu cong hoc nganh tuong hoc ma hoi cac ((nhan dan) OR (van tai)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu cong hoc nganh tuong hoc ma hoi cac ((nhan dan) or (van tai))*.