Perhaps you should try some spelling variations:
nganh nong » nganh cong
nong thuoc » dong thuoc, long thuoc, khong thuoc
hoc nganh » hoc nhanh
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
thuoc xa » thuoc ma, thuoc va, thuoc la
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoi tai, hai tap
va phap » va phat, ban phap
phap va » phap vat, pham va, pham van

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