Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh van » thanh san, thanh phan, thanh nhan
thu sach » tu sach, thuat sach, thuoc sach
va cham » va chat, va tham
mang xa » lang xa, mang may, dang xay
cua tre » cua te, cuu tre, cua triet
y mang » cay mang
xuc va » duc va, tuc va, luc va
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y mang xa hoi. hieu ((va cam) or (va cham)) xuc va ((thanh van) OR (thanh toan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y mang xa hoi. hieu ((va cam) OR (va cham)) xuc va ((thanh van) OR (thanh toan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y mang xa hoi. hieu ((va cam) or (va cham)) xuc va ((thanh van) OR (thanh toan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y mang xa hoi. hieu ((va cam) or (va cham)) xuc va ((thanh van) OR (thanh toan)) cua tre*.