good enough - index setting for full text search

gistfile1.txt

"index": {
            "analysis": {
                "analyzer": {
                    "lala_analyzer": {
                        # "tokenizer": "vi_tokenizer",
                        "tokenizer": "standard",
                        "char_filter":  ["html_strip"],
                        "filter": [
                            "icu_folding"
                        ]
                    },
                    "keyword_analyzer": {
                        "filter": [
                            "lowercase",
                            "asciifolding",
                            "trim"
                        ],
                        "char_filter": [],
                        "type": "custom",
                        "tokenizer": "keyword"
                    },
                    "edge_ngram_analyzer": {
                        "filter": [
                            "lowercase"
                        ],
                        "tokenizer": "edge_ngram_tokenizer"
                    },
                    "edge_ngram_search_analyzer": {
                        "tokenizer": "lowercase"
                    }
                },
                "tokenizer": {
                    "edge_ngram_tokenizer": {
                        "type": "edge_ngram",
                        "min_gram": 2,
                        "max_gram": 5,
                        "token_chars": [
                            "letter"
                        ]
                    }
                }
            }
        }