拼音搜索，设置了简拼analyzer，看分词没问题，查询部分词查不到，不知道什么原因？

拼音analysis如下（只截取了需要的部分）：

"filter": {               

                "pinyin_simple_filter":{

                    "type" : "pinyin",

                    "keep_first_letter":true,

                    "keep_separate_first_letter" : false,

                    "keep_full_pinyin" : false,

                    "keep_original" : false,

                    "limit_first_letter_length" : 50,

                    "lowercase" : true

                },

                "pinyin_full_filter":{

                    "type" : "pinyin",

                    "keep_first_letter":false,

                    "keep_separate_first_letter" : false,

                    "keep_full_pinyin" : true,                        

                    "none_chinese_pinyin_tokenize":true,

                    "keep_original" : false,

                    "limit_first_letter_length" : 50,

                    "lowercase" : true

                }

            },

"analyzer": {

                "pinyiSimpleSearchAnalyzer":{

                    "tokenizer" : "ik_max_word",     

                    "filter": ["pinyin_simple_filter", "lowercase"]    

                },               

                "pinyiFullSearchAnalyzer":{

                    "tokenizer" : "ik_max_word",     

                    "filter": ["pinyin_full_filter", "lowercase"]    

                }

            }

 
docName字段定义如下：
 

"docName" : {

          "type": "text", 

          "analyzer": "k_analyzer",

          "search_analyzer": "k2_analyzer",

          "fields": {

            "f_pinyin":{

              "type": "text", 

              "analyzer": "pinyiFullSearchAnalyzer",

              "search_analyzer": "pinyiFullSearchAnalyzer"

            },

            "s_pinyin":{

              "type": "text", 

              "analyzer": "pinyiSimpleSearchAnalyzer",

              "search_analyzer": "pinyiSimpleSearchAnalyzer"

            },

            "std":{

              "type": "text", 

              "analyzer": "std_analyzer",

              "search_analyzer": "std2_analyzer"

            }

          }

        },

分词结果如下：

curl -H "Content-Type: application/json" -XGET 'http://localhost:9200/pinyin_index/_analyze?pretty=true' -d '{

    "analyzer":"pinyiSimpleSearchAnalyzer",

    "text":"大黑牛2018套餐"

}'





{

  "tokens" : [

    {

      "token" : "d",

      "start_offset" : 0,

      "end_offset" : 1,

      "type" : "CN_CHAR",

      "position" : 0

    },

    {

      "token" : "h",

      "start_offset" : 1,

      "end_offset" : 2,

      "type" : "CN_CHAR",

      "position" : 1

    },

    {

      "token" : "n",

      "start_offset" : 2,

      "end_offset" : 3,

      "type" : "CN_CHAR",

      "position" : 2

    },

    {

      "token" : "2018",

      "start_offset" : 3,

      "end_offset" : 7,

      "type" : "ARABIC",

      "position" : 3

    },

    {

      "token" : "tc",

      "start_offset" : 7,

      "end_offset" : 9,

      "type" : "CN_WORD",

      "position" : 4

    },

    {

      "token" : "t",

      "start_offset" : 7,

      "end_offset" : 8,

      "type" : "COUNT",

      "position" : 5

    },

    {

      "token" : "c",

      "start_offset" : 8,

      "end_offset" : 9,

      "type" : "CN_CHAR",

      "position" : 6

    }

  ]

}

构建查询如下：

  curl  -H "Content-Type: application/json" -XGET 'localhost:9200/pinyin_index/_search?pretty' -d '

  {

    "query": {

      "query_string": {

          "query": "tc",

          "default_field": "docName.s_pinyin",

          "default_operator":"AND"

      }

    },

    "size": 100,

    "highlight": {

      "pre_tags": ["<h1>"],

      "post_tags": ["</h1>"],

      "fields": {

        "docName.s_pinyin": {}

      }

    }

  }'

结果中没有上面分词的那条数据“大黑牛2018套餐”，但通过搜索"taocan"或者“套餐”都是可以搜到的。
搜索"dhn"、“2018”都能搜到，但“tc”就不行。。没有配置过各类词表。

想知道为啥搜“tc”就出不来结果，各位大佬可以帮忙看看问题出在哪吗？