Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
sach ky » sac ky, sach y, sach ty
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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: su ((sach ky) OR (cac ky)) nang x hoi. lieu va nam ((xuc va) OR (luc va)) thanh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (cac ky)) nang x hoi. lieu va nam ((xuc va) OR (luc va)) thanh hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (cac ky)) nang x hoi. lieu va nam ((xuc va) OR (luc va)) thanh hai cua tre*.