elaticsearch中文分词搜索权重问题

如下,我创建了一个索引并填充了一些内容

PUT user
{
  "mappings": {
    "user":{
    "properties": {
      "name":{
        "type": "keyword"
      },
      "desc":{
        "type":"text",
        "analyzer" : "ik_max_word"
      },
      "age":{
        "type":"integer"
      }
    }
  }}
}

PUT user/user/1
{
  "name":"张三",
  "desc":"打篮球的河南人",
  "age":3
}

PUT user/user/2
{
  "name":"李四",
  "desc":"打网球的山东人",
  "age":10
}

PUT user/user/3
{
  "name":"王五",
  "desc":"打网球的河南人",
  "age":20
}

PUT user/user/4
{
  "name":"赵六",
  "desc":"踢足球的天津人",
  "age":30
}

PUT user/user/5
{
  "name":"钱七",
  "desc":"打网球的天津人",
  "age":40
}

然后我在按照”desc“搜索的时候结果是这样的
查询条件:

GET user/user/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "match": {
            "desc": "网球 天津人"
          }
        }
      ]
    }
  }
}

结果:

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 4,
    "max_score" : 1.5686159,
    "hits" : [
      {
        "_index" : "user",
        "_type" : "user",
        "_id" : "4",
        "_score" : 1.5686159,
        "_source" : {
          "name" : "赵六",
          "desc" : "踢足球的天津人",
          "age" : 30
        }
      },
      {
        "_index" : "user",
        "_type" : "user",
        "_id" : "5",
        "_score" : 1.1507283,
        "_source" : {
          "name" : "钱七",
          "desc" : "打网球的天津人",
          "age" : 40
        }
      },
      {
        "_index" : "user",
        "_type" : "user",
        "_id" : "2",
        "_score" : 0.87546873,
        "_source" : {
          "name" : "李四",
          "desc" : "打网球的山东人",
          "age" : 10
        }
      },
      {
        "_index" : "user",
        "_type" : "user",
        "_id" : "3",
        "_score" : 0.2876821,
        "_source" : {
          "name" : "王五",
          "desc" : "打网球的河南人",
          "age" : 20
        }
      }
    ]
  }
}


在我看来,明明是"打网球的天津人"更符合,为什么却没被排在最前面?
求大神指教!

es版本:6.5.4
ik版本:6.5.4

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