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
phap van » phan van, phap han, phap vat
so mach » so sach, tao mach, kon mach
mo hoc » mon hoc, co hoc
ma hoi » mai hoi, xa hoi, ma hoa

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

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