elasticsearch IK 分词怎么无效呀？

index test的 mapping 定义：

"content": { "type": "text", "analyzer": "ik_smart" }, "title": { "type": "text", "analyzer": "ik_smart" } 

测试分词：

http://127.0.0.1:9200/_analyze

提交参数：

{ "text": "中国美国英国", "analyzer": "ik_smart" } 

返回

{ "tokens": [ { "token": "中国", "start_offset": 0, "end_offset": 2, "type": "CN_WORD", "position": 0 }, { "token": "美国", "start_offset": 2, "end_offset": 4, "type": "CN_WORD", "position": 1 }, { "token": "英国", "start_offset": 4, "end_offset": 6, "type": "CN_WORD", "position": 2 } ] } 

_search 测试一下索引 test

get body

{ "size": 20, "query": { "match": { "content": "广州人" } } } 

返回：

{ "took": 0, "timed_out": false, "_shards": { "total": 5, "successful": 5, "skipped": 0, "failed": 0 }, "hits": { "total": 1, "max_score": 0.84268904, "hits": [ { "_index": "dcc-speechcrafts", "_type": "dcc-speechcraft", "_id": "AXIyjmXuVhRXxkRgwNlT", "_score": 0.84268904, "_source": { "title": "", "content": "qefdygyrfh 广州人" } } ] } } 

第二次_search 测试一下

get body

{ "size": 0, "query": { "match": { "content": "广州" } } } 

返回：

{ "took": 1, "timed_out": false, "_shards": { "total": 5, "successful": 5, "skipped": 0, "failed": 0 }, "hits": { "total": 0, "max_score": null, "hits": [] } } 

问题，我那条记录内容包含广州人这三个字，为什么分别用广州人和广州两个词去查询，一次有结果，一次没结果呀？按道理用广州去查询应该也是返回一样的结果的呀，这什么问题？

elasticsearch 5.6.16