Perhaps you should try some spelling variations:
nganh nong » nganh cong
hoc nganh » hoc nhanh
mach hoc » cach hoc, dich hoc, anh hoc
nong hoc » dong hoc, nang hoc, nong thon
su mach » su sach
va phan » van phan, va phap, hoa phan
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: su mach hoc tap, nghien cuu mo hoc nganh nong hoc xa hoi ((va phan) OR (va phat)) va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su mach hoc tap, nghien cuu mo hoc nganh nong hoc xa hoi ((va phan) OR (va phat)) va".
• Adding a wildcard symbol may retrieve word variants: su mach hoc tap, nghien cuu mo hoc nganh nong hoc xa hoi ((va phan) OR (va phat)) va*.