Perhaps you should try some spelling variations:
nganh nong » nganh cong
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
nong hoc » dong hoc, nang hoc, nong thon
nhan tai » hang tai, van tai, toan tai
nhan va » nhan dan, nhan tao, phan van
mo hoc » mon hoc, co hoc
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach hoc tap, nghien cuu mo hoc nganh nong hoc xa hoi va ((nhan va) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien cuu mo hoc nganh nong hoc xa hoi va ((nhan va) OR (nhan tai)).
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu mo hoc nganh nong hoc xa hoi va ((nhan va) or (nhan tai))*.