Perhaps you should try some spelling variations:
tay nguoi » toc nguoi, dao nguoi, ca nguoi
lam nguoi » dao nguoi
sach toc » bach tuoc, sach duoc, sach nuoc
tao mach » tao bac, tao may, tim mach
mach hoc » cach hoc, dich hoc, anh hoc
te sach » toc sach
toc tay » toc thai
hoc lam » duoc lam

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 toc tay nguoi ) OR ( tao mach hoc lam nguoi ))~.
• Adding a wildcard symbol may retrieve word variants: (( te sach toc tay nguoi ) or ( tao mach hoc lam nguoi ))*.