Perhaps you should try some spelling variations:
giao nguoi » gian nguoi, giap nguoi, giau nguoi
tay nguoi » toc nguoi, dao nguoi
thu mach » thu sach, thuat mach, thu hoach
mach hoc » dich hoc, anh hoc, bac hoc
cach hoc » cach thuc, cach thoi, dich hoc
hoc giao » hoc cao
hoc tay » toc tay, hoc tap, hoc may
so cach » so sach, co cach, loi cach

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

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