我有一个由大约40000个船名组成的索引
当发布一个关于船只名称的查询，即“tuc”时，当我将查询项减少到“t”时，会得到许多结果。但是，我从“tuc”查询得到的结果不在结果集中？
我有点不知道是什么原因造成的，但不知道是不是因为总的结果集太大而被删掉了？
一些统计数据：
查询：

{
"query" : {
    "bool" : {
        "must" : [
            {
                "query_string" : {
                    "fields" : ["vesselName"],
                    "type" : "phrase_prefix",
                    "query" : "T"
                }
            }
        ]
    }
}

结果（第一个）：

"max_score": 12.450134,
    "hits": [
        {
            "_index": "vesselsindex",
            "_type": "_doc",
            "_id": "06ad4663-42f6-4771-b350-0d3b7a1b3229",
            "_score": 12.450134,
            "_source": {
                "vesselId": "06ad4663-42f6-4771-b350-0d3b7a1b3229",
                "callSign": "FATA",
                "vesselName": "TAAPE"
            }
        },

结果（使用术语“tuc”时）：

{
            "_index": "vesselsindex",
            "_type": "_doc",
            "_id": "e7bea95c-6819-48b1-b52e-0a8fbaeef1df",
            "_score": 11.831188,
            "_source": {
                "vesselId": "e7bea95c-6819-48b1-b52e-0a8fbaeef1df",
                "callSign": "PBAQ",
                "vesselName": "TUCANA"
            }
        },

设置：

{
"vesselsindex": {
    "settings": {
        "index": {
            "number_of_shards": "1",
            "provided_name": "vesselsindex",
            "max_result_window": "50000",
            "creation_date": "1604061335143",
            "analysis": {
                "analyzer": {
                    "keywordWithCaseIgnore": {
                        "filter": [
                            "lowercase"
                        ],
                        "type": "custom",
                        "tokenizer": "keyword"
                    }
                }
            },
            "number_of_replicas": "1",
            "uuid": "M-m3nIB5TqeiPNR2NR5zWQ",
            "version": {
                "created": "7060099"
            }
        }
    }
}

统计数据：

{
"_shards": {
    "total": 2,
    "successful": 1,
    "failed": 0
},
"_all": {
    "primaries": {
        "docs": {
            "count": 43510,
            "deleted": 0
        },
        "store": {
            "size_in_bytes": 12762612
        },