Perhaps you should try some spelling variations:
may nguoi » tay nguoi, ma nguoi, lay nguoi
tai nguoi » tay nguoi, tac nguoi, loai nguoi
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
te sach » toc sach
hoc may » hoc ma
tu mach » tu cach, tu manh, tu hach
hoc tai » hoc dai, hoc tap, hoc bai

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