Ngram working sample

gistfile1.json

// Config
{
    "index" : {
        "analysis" : {
            "filter" : {
              "my_ngram" : {
                "max_gram" : 20,
                "min_gram" : 2,
                "type" : "nGram"
              }
            },
            "analyzer" : {
                "lowercase_keyword" : {
                   "filter" : [
                     "standard",
                     "lowercase"
                    ],
                   "type" : "custom",
                   "tokenizer" : "standard"
                },
                "lowercase_keyword_ngram" : {
                  "filter" : [
                    "standard",
                    "lowercase",
                    "my_ngram"
                  ],
                  "type" : "custom",
                  "tokenizer" : "standard"
                }
            }
       }
    }
}

// Mapping
{
  "mapping": {
    "properties": {
      "title": {
        "type": "string",
        "indexAnalyzer": "lowercase_keyword_ngram",
        "searchAnalyzer": "lowercase_keyword"
      }
    }
  }
}

// Data
{
  "title": "please search me"
}

// Query 
{
  "query": {
    "query_string": {
      "default_field": "title",
      "default_operator": "AND",
      "query": "ase se"
    }
  }
}