Perhaps you should try some spelling variations:
nhanh khong » nhanh chong, nganh khong, nhan khong
goc nhanh » hoc nhanh, doc nhanh, goc nhan
sach hoi » sach doi, sach moi, cach thoi
thuoc xa » thuoc ma, thuoc va, thuoc tai
thuoc la » thuoc ma, thuoc va, thuoc tai
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
hoi tai » hoc tai, hoi trac
cuu mot » cua mot, cuu mo, huu mot
va nhan » van nhan, ca nhan, va phan

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