ElasticSearch部分字符串多个字段

Question

    My index has the following fields:

（1）title：简单分析字符串。

（2）美食：包括诸如国际|自助餐|亚洲＆＃39;等字符串值。

    I use the following query strings:

（1）

"query_string": {
    "fields": ["title", " cuisine"],
    "query": "*buffet*"
}

（2）

"multi_match": {
    "query": "*buffet*",
    "type": "phrase_prefix",
    "fields": ["title", " cuisine"]
}

None of them works as both return empty result. Any advice and insight is appreciated. Thanks!

以下是我的映射片段：

{
"search.weeloy.asia": {
    "mappings": {
        "data": {
            "properties": {
                "title": {
                    "type": "text",
                    "fields": {
                        "keyword": {
                            "type": "keyword",
                            "ignore_above": 256
                        }
                    }
                },
                "cuisine": {
                    "type": "text",
                    "fields": {
                        "keyword": {
                            "type": "keyword",
                            "ignore_above": 256
                        }
                    }
                },