How to include all words to the search index, such as "from" "to"

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Hi @aditi.ahuja and @abhinav
Thanks for your reply.
Yes, @aditi.ahuja , I confirmed it works with the analysis wizard but I don’t know why my FTS doesn’t work.

I assigned the custom analyzer to that field and I mentioned this field at query. Please refer to the below FTS settings and query: FYI, the target field name is “value” and the custom analyzer is “all-words”.

{
  "type": "fulltext-index",
  "name": "test-value",
  "uuid": "223e9e7211a5670e",
  "sourceType": "gocbcore",
  "sourceName": "my-couchbase",
  "sourceUUID": "46d8fdb6a3b6c66d824b9bbf2598ff24",
  "planParams": {
    "maxPartitionsPerPIndex": 1024,
    "indexPartitions": 1
  },
  "params": {
    "doc_config": {
      "docid_prefix_delim": "",
      "docid_regexp": "",
      "mode": "scope.collection.type_field",
      "type_field": "type"
    },
    "mapping": {
      "analysis": {
        "analyzers": {
          "all-words": {
            "token_filters": [
              "to_lower"
            ],
            "tokenizer": "unicode",
            "type": "custom"
          }
        }
      },
      "default_analyzer": "all-words",
      "default_datetime_parser": "dateTimeOptional",
      "default_field": "_all",
      "default_mapping": {
        "dynamic": false,
        "enabled": false
      },
      "default_type": "_default",
      "docvalues_dynamic": false,
      "index_dynamic": false,
      "store_dynamic": false,
      "type_field": "_type",
      "types": {
        "trans.test-trans": {
          "dynamic": false,
          "enabled": true,
          "properties": {
            "value": {
              "dynamic": false,
              "enabled": true,
              "fields": [
                {
                  "analyzer": "all-words",
                  "index": true,
                  "name": "value",
                  "store": true,
                  "type": "text"
                }
              ]
            }
          }
        }
      }
    },
    "store": {
      "indexType": "scorch",
      "segmentVersion": 15
    }
  },
  "sourceParams": {}
}

and Query is :

SELECT * FROM `my-couchbase`.`trans`.`test-trans` AS t1
WHERE SEARCH(t1, { "explain": false, "query": { "match": "from", "field": "value" } })

But this query still fails to find “John was from Sydney.”.
Please help me to find what I missed?

Many thanks and looking for your advice.
Jin