Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
van thanh » ban thanh, van tuan
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
tu sac » tu sach, tu cac, tu san
tu can » tu ban, tu cac, thu canh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu can)) ky nang ((o lai) or (o lao)). hieu ve cac duc van thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu can)) ky nang ((o lai) OR (o lao)). hieu ve cac duc van thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu can)) ky nang ((o lai) or (o lao)). hieu ve cac duc van thanh hai cua tre*.