Increase the number of results in elasticsearch

 curl -XGET '172.xx.xxx.xx:9200/document/post/_search?pretty=true' -d '{
"from" : 0, "size" : 30,
    "query" : { "query_string" : { "query": "assistance in voting" }},
    "highlight" : {
        "fields" : {
            "text" : {}
        }
    }
}'

http://www.elasticsearch.org/guide/reference/api/search/from-size.html