bool must behaviour

bool must behaviour

url:
http://localhost:9200/betadb/interaction/_search

Working query:
{
    "sort": [
        {
            "interaction_date": "desc"
        }
    ],
    "query": {
        "filtered": {
            "query": {
                "term": {
                    "body": "skierka"
                }
            },
            "filter": {
                "bool": {
                    "must": 
                        {
                            "term": {
                                "operators": [
                                    "35",
                                    "12",
                                    "51",
                                    "55",
                                    "14",
                                    "29"
                                ]
                            }
                        }
                    
                }
            }
        }
    },
    "from": "0",
    "size": "50",
    "fields": [
        "interaction_id",
        "last_updated","operators","labels"
    ]
}

Result:
{
    "took": 52,
    "timed_out": false,
    "_shards": {
        "total": 5,
        "successful": 5,
        "failed": 0
    },
    "hits": {
        "total": 7,
        "max_score": null,
        "hits": [
            {
                "_index": "betadb",
                "_type": "interaction",
                "_id": "45244",
                "_score": null,
                "fields": {
                    "last_updated": "2010-11-12T08:37:53",
                    "operators": "{29}",
                    "interaction_id": "45244",
                    "labels": "{1}"
                },
                "sort": [
                    1236588240000
                ]
            },
            {
                "_index": "betadb",
                "_type": "interaction",
                "_id": "143994",
                "_score": null,
                "fields": {
                    "last_updated": "2010-11-16T12:59:37",
                    "operators": "{29}",
                    "interaction_id": "143994",
                    "labels": "{1}"
                },
                "sort": [
                    1236377241000
                ]
            },
            {
                "_index": "betadb",
                "_type": "interaction",
                "_id": "45253",
                "_score": null,
                "fields": {
                    "last_updated": "2011-07-06T23:51:13",
                    "operators": "{29}",
                    "interaction_id": "45253",
                    "labels": "{1}"
                },
                "sort": [
                    1236338803000
                ]
            },
            {
                "_index": "betadb",
                "_type": "interaction",
                "_id": "144024",
                "_score": null,
                "fields": {
                    "last_updated": "2011-07-06T23:51:14",
                    "operators": "{29}",
                    "interaction_id": "144024",
                    "labels": "{1}"
                },
                "sort": [
                    1236337767000
                ]
            },
            {
                "_index": "betadb",
                "_type": "interaction",
                "_id": "45515",
                "_score": null,
                "fields": {
                    "last_updated": "2010-11-12T08:39:41",
                    "operators": "{29}",
                    "interaction_id": "45515",
                    "labels": "{1}"
                },
                "sort": [
                    1234428752000
                ]
            },
            {
                "_index": "betadb",
                "_type": "interaction",
                "_id": "144073",
                "_score": null,
                "fields": {
                    "last_updated": "2011-07-06T23:51:18",
                    "operators": "{29}",
                    "interaction_id": "144073",
                    "labels": "{1}"
                },
                "sort": [
                    1234368038000
                ]
            },
            {
                "_index": "betadb",
                "_type": "interaction",
                "_id": "144138",
                "_score": null,
                "fields": {
                    "last_updated": "2011-07-06T23:51:20",
                    "operators": "{29}",
                    "interaction_id": "144138",
                    "labels": "{1}"
                },
                "sort": [
                    1234358556000
                ]
            }
        ]
    }
}

Failing Query:
{
    "sort": [
        {
            "interaction_date": "desc"
        }
    ],
    "query": {
        "filtered": {
            "query": {
                "term": {
                    "body": "skierka"
                }
            },
            "filter": {
                "bool": {
                    "must": 
                        {
                            "term": {
                                "operators": [
                                    "35",
                                    "12",
                                    "51",
                                    "55",
                                    "14",
                                    "19"
                                ]
                            }
                        }
                    
                }
            }
        }
    },
    "from": "0",
    "size": "50",
    "fields": [
        "interaction_id",
        "last_updated","operators","labels"
    ]
}

Result:
{
    "took": 5,
    "timed_out": false,
    "_shards": {
        "total": 5,
        "successful": 5,
        "failed": 0
    },
    "hits": {
        "total": 0,
        "max_score": null,
        "hits": []
    }
}