Multi match query and the scoring

Elastic Stack Elasticsearch
1

I have couple documents in the index, and 2 of them are

{
          "id" : "c0706549-d06c-4043-8086-1b4b3ec1ef95",
          "title" : "Google Pixel XL",
          "memory" : "4GB",
          "quantity" : 3
}
{
          "id" : "23ecaecd-6b3f-4592-b79f-f46a20157221",
          "title" : "Google Pixel XL",
          "memory" : "6GB",
          "quantity" : 1
}

And for the query

{
  "query": { "multi_match": { "query": "pixel xl 6gb", "fields": ["title", "memory"] } }
}

I get the response

{
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "c0706549-d06c-4043-8086-1b4b3ec1ef95",
        "_score" : 2.4280763,
        "_source" : {
          "id" : "c0706549-d06c-4043-8086-1b4b3ec1ef95",
          "title" : "Google Pixel XL",
          "memory" : "4GB",
          "quantity" : 3
        }
      },
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "23ecaecd-6b3f-4592-b79f-f46a20157221",
        "_score" : 2.4280763,
        "_source" : {
          "id" : "23ecaecd-6b3f-4592-b79f-f46a20157221",
          "title" : "Google Pixel XL",
          "memory" : "6GB",
          "quantity" : 1
        }
      }

But I expect that the document with the memory field 6GB will be on top, can you please advise why this happens and how to fix it?

2

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