Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
thuoc lai » thuoc tai, thuoc la, thuoc sai
sach hoc » cach hoc, sach hoi, mach hoc
nhan van » nhan dan, nhan va, nha van
phan van » pham van, thanh van, luan van
so sach » so sanh, bo sach, co sach
lai hoi » dai hoi, lai hoa, lai roi
mo hoc » mon hoc, co hoc

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 mo hoc nganh khong thuoc lai hoi va ((nhan van) or (phan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu mo hoc nganh khong thuoc lai hoi va ((nhan van) OR (phan van)).
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu mo hoc nganh khong thuoc lai hoi va ((nhan van) or (phan van))*.