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
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 sach » thu sach, su sach, te sach
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 dap, nghien cuu cong hoc nganh nong hoc ma hai ((van thanh) or (van tuan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi dap, nghien cuu cong hoc nganh nong hoc ma hai ((van thanh) OR (van tuan)) van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien cuu cong hoc nganh nong hoc ma hai ((van thanh) or (van tuan)) van*.