Perhaps you should try some spelling variations:
nganh nong » nganh cong
hoc nganh » hoc nhanh
van thanh » ban thanh
sach hoi » sach doi, sach moi, cach thoi
nong hoc » dong hoc, nang hoc, nong thon
van tuan » van quan, van ban, anh tuan
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
ma hai » ta hai, va hai, xa hai

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 ma hai ((van thanh) OR (van tuan)) 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 ma hai ((van thanh) OR (van tuan)) van".
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu mon hoc nganh nong hoc ma hai ((van thanh) OR (van tuan)) van*.