Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
sach hoi » sach doi, sach moi, cach thoi
phan van » pham van, thanh van, luan van
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va phan » van phan, va phat, va phap
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: tu sach hoi dap, nghien cuu mon hoc ((nganh khong) OR (thanh pho)) hoc xa hoi va phan van~.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien cuu mon hoc ((nganh khong) or (thanh pho)) hoc xa hoi va phan van*.