Perhaps you should try some spelling variations:
lam nguoi » dao nguoi, tay nguoi
dat nguoi » dao nguoi, dau nguoi, mat nguoi
toc nguoi » con nguoi
dung dat » dung va, dung tai
mach hoc » dich hoc, anh hoc, bac hoc
cach hoc » cach thuc, cach thoi, dich hoc
su sach » so sach, vu sach
hoc lam » duoc lam
su cach » tu cach, su cac, cuu cach
hoc toc » hoc hoc, hoc thuoc, hoc toeic

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

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