Perhaps you should try some spelling variations:
nganh nong » nganh cong
nong thong » nong thon, dong thong, cong thong
dung luat » dung luan, dung cua, dung dat
dung quat » dung quan, dung qua, dung quang
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
cach hoc » cach thuc, cach thoi, dich hoc
tu cach » tu cac
xay hai » xa hai, lay thai, tay thai
hai ban » hai bang, hai ba, tai ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach hoc tap, nghien cuu ((dung luat) OR (dung quat)) nganh nong thong xay hai ban thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach hoc tap, nghien cuu ((dung luat) OR (dung quat)) nganh nong thong xay hai ban thanh van".
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien cuu ((dung luat) OR (dung quat)) nganh nong thong xay hai ban thanh van*.