Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nhanh nong » nhanh dong, nhanh song, nganh nong
hoc nhanh » hoc nganh, hoc phan
cong hoc » dong hoc, cong hoa, cong coc
nong hoc » dong hoc, nang hoc, nong thon
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoi tai, hai tap
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((hoi tap) OR (hoc tap)), nghien thu cong hoc nhanh nong hoc mai hoi va nhan dan~.
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi tap) or (hoc tap)), nghien thu cong hoc nhanh nong hoc mai hoi va nhan dan*.