Es query

{
  "query": {
    "bool": {
      "must": [
        {
          "nested": {
            "path": "treatments",
            "query": {
              "bool": {
                "should": [
                  {
                    "match": {
                      "treatments.keywords": "hea"
                    }
                  },
                  {
                    "match": {
                      "treatments.keywords": "hea"
                    }
                  },
                  {
                    "match": {
                      "treatments.treatment_name": "hea"
                    }
                  },
                  {
                    "prefix": {
                      "treatments.keywords": "hea"
                    }
                  },
                  {
                    "prefix": {
                      "treatments.treatment_name": "hea"
                    }
                  }
                ],
                "minimum_should_match": 1
              }
            }
          }
        }
      ],
      "minimum_should_match": 1
    }
  }
}