Perhaps you should try some spelling variations:
nganh nong » nganh cong
hoc nganh » hoc nhanh
thanh van » thanh san, thanh toan, thanh phan
sach hoi » sach doi, sach moi, cach thoi
nong hoc » dong hoc, nang hoc, nong thon
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hai van » thai van, hai tan, hao van
hoc xa » hoc ma
ha van » hoa van, nha van, va van

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoi tap, nghien cuu mon hoc nganh nong hoc xa ((hai van) OR (ha van)) thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoi tap, nghien cuu mon hoc nganh nong hoc xa ((hai van) OR (ha van)) thanh van".
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu mon hoc nganh nong hoc xa ((hai van) OR (ha van)) thanh van*.