Perhaps you should try some spelling variations:
nganh nong » nganh cong
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
van thanh » ban thanh
thoi tap » toi tap, hoc tap, thoi dai
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
nong hoc » dong hoc, nang hoc, nong thon
van tuan » van quan, van ban, anh tuan
tu cach » tu cac
hoc ta » hoc tap, hoc tai, hoc tan
ta hai » tai hai, tac hai, tra 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 cach thoi tap, nghien cuu cong hoc nganh nong hoc ta hai ((van thanh) or (van tuan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien cuu cong hoc nganh nong hoc ta hai ((van thanh) OR (van tuan)) van.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien cuu cong hoc nganh nong hoc ta hai ((van thanh) or (van tuan)) van*.