Perhaps you should try some spelling variations:
nhanh khong » nhanh chong, nganh khong, nhan khong
hoc nhanh » hoc nganh, hoc phan
sach hoi » sach doi, sach moi, cach thoi
thuoc ma » hoc ma, duoc ma
thuoc la » thuoc va, thuoc tai, thuoc ban
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao

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, nghien cuu mot hoc nhanh khong ((thuoc ma) or (thuoc la)) hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, nghien cuu mot hoc nhanh khong ((thuoc ma) OR (thuoc la)) hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu mot hoc nhanh khong ((thuoc ma) or (thuoc la)) hoi va nhan va*.