Kstem not giving the expected results

Elastic Stack Elasticsearch
1

am using kstem due to this am not getting the proper results.

Ex:

In _analyze

Query:

{
    "tokenizer": "standard",
    "filter": [
        "kstem"
    ],
    "text": "marbles"
}

in response, I am getting below

{
    "tokens": [
        {
            "token": "marbles",
            "start_offset": 0,
            "end_offset": 7,
            "type": "<ALPHANUM>",
            "position": 0
        }
    ]
}

i need to search for marble as well, guide me with this, without changing the stemmer method. due to one condition with hospitals and hospitalization