Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
hoc nganh » hoc nhanh
thuoc tai » nuoc tai, hoc tai, thuoc ma
phan dang » phan dau, phan cong, phan ung
sach hoc » cach hoc, sach hoi, mach hoc
nhan dan » phan dau, gian dan, nhan tai
su sach » so sach, vu sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
tai hoi » tai khoi, dai hoi, tai hai

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 mon hoc nganh khong thuoc tai hoi va ((phan dang) OR (nhan dan))~.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cuu mon hoc nganh khong thuoc tai hoi va ((phan dang) or (nhan dan))*.