Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
qua cam » qua cham, qua cac, qua ca
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
loc va » hoc va
luc va » duc va, tuc va

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: te sach ky lang xa hoi. hieu qua cam ((luc va) OR (loc va)) ((hanh vai) OR (thanh toan)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu qua cam ((luc va) OR (loc va)) ((hanh vai) or (thanh toan)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu qua cam ((luc va) OR (loc va)) ((hanh vai) or (thanh toan)) cua tre*.