How do I run a query for searching a text which is in a blob datatype

[mangesh]

here is data which i posted to elasticsearch:

{
"took": 112,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 0.6931472,
"hits": [
{
"_index": "profiles",
"_type": "resume",
"_id": "2013",
"_score": 0.6931472,
"_source": {
"filetype": "doc",
"firstname": "akash",
"filecontent": "PK\u0003\u0004\u0014\u0000\u0006\u0000\b\u0000\u0000\u0000!\u00002oWf\u0001\u0000\u0000¥\u0005\u0000\u0000\u0013\u0000\b\u0002[Content_Types].xml ¢\u0004\u0002( \u0000\u0002\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000"
}
]
}

and I want to find the some text content from "filecontent" field.
how to create query for this :
I tried this one but wont work:

{"query": {
"bool": {
"must": [
{
"match": {
"filecontent": "Documentation"
}
}
],
"must_not": [],
"should": []
}
},"from": 0,
"size": 10
}

[eperry (Ed)]

I maybe mis-understanding your question but

Your filecontent field does not contain any words "Documentation:. So not sure what your expecting to find