Perhaps you should try some spelling variations:
lay nguoi » lam nguoi, tay nguoi, ly nguoi
sach duoc » sach nuoc, sach dao, sach dung
toc nguoi » con nguoi
cach hoc » cach thuc, cach thoi, dich hoc
duoc toc » duoc hoc, duoc duoc, duoc cuoc
tu cach » tu cac
hoc lay » hoc may, hoc lam, hoc ly
vu sach » vu bach, su sach, vu khach

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: (( tu cach hoc lay nguoi ) OR ( vu sach duoc toc nguoi ))~.
• Adding a wildcard symbol may retrieve word variants: (( tu cach hoc lay nguoi ) or ( vu sach duoc toc nguoi ))*.