Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
dang mau » dong mau, dang van, dang su
hai cua » thai cua, dai cua, hoi cua
cac van » cac dan
cua tre » cua te, cuu tre, cua triet
mau hoi » cau hoi, mai hoi, mau ho
ky dang » ky nang, ky danh
va cao » va cac, va co, va dao
va cam » va cham, va cac, 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: ((te sach) or (toc sach)) ky dang mau hoi. lieu ((va cam) or (va cao)) cac van thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky dang mau hoi. lieu ((va cam) OR (va cao)) cac van thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky dang mau hoi. lieu ((va cam) or (va cao)) cac van thanh hai cua tre*.