Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
xanh di » danh di, vanh dai, xanh tai
banh di » danh di, banh chi, vanh dai
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao

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: thu sach ky lang xa hoi. hieu ((va cam) OR (va cao)) xuc ban ((banh di) OR (xanh di)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky lang xa hoi. hieu ((va cam) or (va cao)) xuc ban ((banh di) OR (xanh di)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang xa hoi. hieu ((va cam) or (va cao)) xuc ban ((banh di) OR (xanh di)) cua tre*.