Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
phat van » pham van, phan van, phap van
su sach » so sach, vu sach
mon hoc » toan hoc, dong hoc
mo hoc » co hoc
ma hoi » mai hoi, xa hoi, ma hoa

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: su sach hoc tap, nghien cuu ((mo hoc) OR (mon hoc)) nganh khoa hoc ma hoi va phat van~.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cuu ((mo hoc) or (mon hoc)) nganh khoa hoc ma hoi va phat van*.