Perhaps you should try some spelling variations:
nganh nong » nganh cong
mach hoc » cach hoc, dich hoc, anh hoc
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
ke mach » ke hoach
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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

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