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
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
thuoc xa » thuoc ma, thuoc va, thuoc la
phan van » pham van, thanh van, luan van
so sach » so sanh, bo sach, co sach
va phan » van phan, va phat, va phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach hoc tap, nghien ((cuu dong) or (cuu tinh)) hoc nganh khong thuoc xa hoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien ((cuu dong) OR (cuu tinh)) hoc nganh khong thuoc xa hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien ((cuu dong) or (cuu tinh)) hoc nganh khong thuoc xa hoi va phan van*.