Query is ok but will return null!

gistfile1.js

{
  "filtered":{
    "query":{
      "query_string":{
        "query":"*"
      }
    },
    "filter":{
      "term":{
        "field":"Val1"
      }
    }
  }
}

QueryInJava.java

SearchSourceBuilder cBuilder = SearchSourceBuilder.searchSource();
        cBuilder.query(QueryBuilders.queryString("*")
                .defaultOperator(QueryStringQueryBuilder.Operator.OR)
                .useDisMax(true));

        cBuilder.filter(FilterBuilders.termFilter("field", "Val1"));