Perhaps you should try some spelling variations:
nganh nong » nganh cong
hoc nganh » hoc nhanh
nhan dan » phan dau, gian dan, nhan tai
sach hoi » sach doi, sach moi, cach thoi
nong hoc » dong hoc, nang hoc, nong thon
mon hoc » toan hoc, dong hoc
cuu mon » cuu mo, cuu mot, cuu cong
hoc mai » hoc ma, hoc dai, hoc bai
hoi cac » hoc cac, voi cac, hoi bac
hoa cac » hoa chat, chon cac
hoi tap » hoi dap, hoc tap, hoi tai
te sach » toc sach

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi tap, nghien cuu mon hoc nganh nong hoc mai ((hoi cac) OR (hoa cac)) nhan dan~".
• Adding a wildcard symbol may retrieve word variants: te sach hoi tap, nghien cuu mon hoc nganh nong hoc mai ((hoi cac) OR (hoa cac)) nhan dan*.