Perhaps you should try some spelling variations:
mac nguoi » ma nguoi, tac nguoi, mat nguoi
tay nguoi » toc nguoi, dao nguoi
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
te sach » toc sach
hoc mac » hoc ma, hoc may, hoc cac
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach hoc mac nguoi ) OR ( tu mach hoc tay nguoi ))~".
• Adding a wildcard symbol may retrieve word variants: (( te sach hoc mac nguoi ) OR ( tu mach hoc tay nguoi ))*.