Perhaps you should try some spelling variations:
nhanh nhung » hanh nhung, nhanh hung, nhanh chuong
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoc nhanh » hoc nganh, hoc phan
sach hoc » cach hoc, sach hoi, mach hoc
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
duoc ha » duc ha, duoc va, duoc pham
duoc ma » duoc lam
va nhan » van nhan, ca nhan, va phan
cua co » cua bo, cua cong

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 hoc tap, nghien cua co hoc nhanh nhung ((duoc ha) or (duoc ma)) hoi va nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cua co hoc nhanh nhung ((duoc ha) OR (duoc ma)) hoi va nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cua co hoc nhanh nhung ((duoc ha) or (duoc ma)) hoi va nhan tai*.