Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
may nguoi » tay nguoi, ma nguoi, lay nguoi
toc nguoi » con nguoi
thuc may » thuc day, truc may, phuc may
sach hoc » cach hoc, sach hoi, mach hoc
tu cach » tu cac
su sach » so sach, vu sach
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: (( tu cach thuc may nguoi ) or ( su sach hoc toc nguoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thuc may nguoi ) OR ( su sach hoc toc nguoi )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thuc may nguoi ) or ( su sach hoc toc nguoi ))*.