Perhaps you should try some spelling variations:
lay nguoi » lam nguoi, ly nguoi, loai nguoi
tay nguoi » toc nguoi, dao nguoi, lam nguoi
sach hoi » sach doi, sach moi, cach thoi
mach hoc » cach hoc, dich hoc, anh hoc
te sach » toc sach
hoi lay » hoi hay, hoi ly, hoi lang
tu mach » tu cach, tu manh, tu hach
hoc tay » toc tay, hoc tap, hoc may

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: (( te sach hoi lay nguoi ) OR ( tu mach hoc tay nguoi ))~.
• Adding a wildcard symbol may retrieve word variants: (( te sach hoi lay nguoi ) or ( tu mach hoc tay nguoi ))*.