Perhaps you should try some spelling variations:
nganh nong » nganh cong
nghien huu » nghien cuu, nguyen huu, nhiem huu
thanh van » thanh san, thanh toan, thanh phan
cau thanh » cuu thanh, cac thanh, cau thang
khoa cau » khoa chau, khoa cam, hoa cau
nong hoc » dong hoc, nang hoc, nong thon
mach hoc » cach hoc, dich hoc, anh hoc
xa khoa » da khoa, bia khoa, tai khoa
tu mach » tu cach, tu manh, tu hach
mot hoc » mo hoc, mot goc, bot hoc
mon hoc » toan hoc, dong 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: tu mach hoc tap, nghien huu ((mot hoc) OR (mon hoc)) nganh nong hoc xa khoa cau thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien huu ((mot hoc) OR (mon hoc)) nganh nong hoc xa khoa cau thanh van".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien huu ((mot hoc) OR (mon hoc)) nganh nong hoc xa khoa cau thanh van*.