Perhaps you should try some spelling variations:
dao nguoi » cho nguoi
tay nguoi » toc nguoi
lay nguoi » lam nguoi, ly nguoi, loai nguoi
mach hoc » cach hoc, dich hoc, anh hoc
tu mach » tu cach, tu manh, tu hach
hoc dao » hoc dan, hoc cao, hoc dai
hoc tay » toc tay, hoc tap, hoc may
hoc lay » hoc may, hoc lam, hoc ly

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu mach hoc dao nguoi ) or ((( tu mach hoc tay nguoi ) or ( tu mach hoc lay nguoi ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu mach hoc dao nguoi ) OR ((( tu mach hoc tay nguoi ) OR ( tu mach hoc lay nguoi )))).
• Adding a wildcard symbol may retrieve word variants: (( tu mach hoc dao nguoi ) or ((( tu mach hoc tay nguoi ) or ( tu mach hoc lay nguoi ))))*.