Perhaps you should try some spelling variations:
giao nguoi » gian nguoi, giap nguoi, giau nguoi
thuoc sach » hoc sach, nuoc sach, thuat sach
tay nguoi » toc nguoi, dao nguoi
cach thuc » anh thuc, cac thu
sach hoc » cach hoc, sach hoi, mach hoc
cac thue » cuc thue, cac thu, cac thuat
hoc tay » toc tay, hoc tap, hoc may

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuoc sach hoc tay nguoi ) or ( so ((cac thue) OR (cach thuc)) giao nguoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuoc sach hoc tay nguoi ) OR ( so ((cac thue) OR (cach thuc)) giao nguoi )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thuoc sach hoc tay nguoi ) or ( so ((cac thue) OR (cach thuc)) giao nguoi ))".
• Adding a wildcard symbol may retrieve word variants: (( thuoc sach hoc tay nguoi ) or ( so ((cac thue) OR (cach thuc)) giao nguoi ))*.