Perhaps you should try some spelling variations:
nganh nong » nganh cong
sach duoc » sach nuoc, sach dao, sach dung
hoc nganh » hoc nhanh
gian lang » gian dan
cach hoc » cach thuc, cach thoi, dich hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
thon xa » thong xa, thoi xa, thong xay
va gian » va gianh, van gian, va giai

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 duoc) or (cach hoc)) tap, nghien cuu cong hoc nganh nong thon xa hoi va gian lang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach duoc) OR (cach hoc)) tap, nghien cuu cong hoc nganh nong thon xa hoi va gian lang.
• Adding a wildcard symbol may retrieve word variants: tu ((sach duoc) or (cach hoc)) tap, nghien cuu cong hoc nganh nong thon xa hoi va gian lang*.