Perhaps you should try some spelling variations:
nganh nong » nganh cong
kon mach » ke mach, ban mach
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
co nganh » hoc nganh, cac nganh, moi nganh
thuoc va » thuoc ma, thuong va, thuoc tai
nhan dan » phan dau, gian dan, nhan tai
cong co » dong co, cong cu, cong so
thuc va » thuc vat, thuc dan, thuc day
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: kon mach hoc tap, nghien cuu cong co nganh nong ((thuoc va) or (thuc va)) hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: kon mach hoc tap, nghien cuu cong co nganh nong ((thuoc va) OR (thuc va)) hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: kon mach hoc tap, nghien cuu cong co nganh nong ((thuoc va) or (thuc va)) hoi ca nhan dan*.