Perhaps you should try some spelling variations:
may nguoi » ma nguoi, lay nguoi, mac nguoi
tay nguoi » toc nguoi, dao nguoi, lam nguoi
sach hoc » sach hoi, mach hoc, sach duoc
cach hoc » cach thuc, cach thoi, dich hoc
te sach » toc sach
hoc may » hoc ma
tu cach » tu cac
hoc tay » toc tay, hoc tap, hoc tai

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