Elasticsearch multi term filter

You should use bool filter to AND all your terms:

"query":{
    "filtered": {
        "query": {
            "query_string": {
                "query":"*tom*",
                "default_operator": "OR",
                "fields": ["username"]
            }
        },
        "filter": {
            "bool" : {
                "must" : [
                    {"term" : { "isActive" : "1" } },
                    {"term" : { "isPrivate" : "0" } },
                    {"term" : { "isOwner" : "1" } }
                ]
             }
         }
     }
}   

For version 2.x+ you can use bool query instead of filtered query with some simple replacement: https://www.elastic.co/guide/en/elasticsearch/reference/7.4/query-dsl-filtered-query.html