Perhaps you should try some spelling variations:
nganh nong » nganh cong
hoc nganh » hoc nhanh
mach hoc » dich hoc, anh hoc, bac hoc
cach hoc » cach thuc, cach thoi, dich hoc
nong hoc » dong hoc, nang hoc, nong thon
dau nhan » dac nhan, dam nhan, danh nhan
nhan dan » phan dau, gian dan, nhan tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoa dau » hoa dan, hoa dai, hoa dam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (cach hoc)) tap, nghien cuu mon hoc nganh nong hoc ma hoa dau nhan dan~.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (cach hoc)) tap, nghien cuu mon hoc nganh nong hoc ma hoa dau nhan dan*.