Perhaps you should try some spelling variations:
nganh nong » nganh cong
thuc cach » thuoc sach, truoc cach, thuc hanh
duong hoc » dong hoc, dung hoc, duong hoi
danh gian » dan gian, danh gia, danh giao
cach toi » cach thoi, cac toi, cach noi
tong hoc » tuong hoc, thong hoc, trong hoc
nong hoc » dong hoc, nang hoc, nong thon
gian dan » gian lang
toi tap » toi gap, toan tap, tong tap
ma hop » mau hop, ma hoa, va hop

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuc cach toi tap, nghien cuu ((tong hoc) or (duong hoc)) nganh nong hoc ma hop danh gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuc cach toi tap, nghien cuu ((tong hoc) OR (duong hoc)) nganh nong hoc ma hop danh gian dan.
• Adding a wildcard symbol may retrieve word variants: thuc cach toi tap, nghien cuu ((tong hoc) or (duong hoc)) nganh nong hoc ma hop danh gian dan*.