flat_filters.json

{
  "query": {
    "filtered": {
      "query": {"match_all": {}},
      "filter": {
        "and": [
          {
            "term": {
              "situation_ids": "1"
            }
          },
          {
            "query": {
              "query_string": {
                "query": "keyword_phrases:\"instalatér\""
              }
            }
          },
          {
            "nested": {
              "path": "activity_areas",
              "score_mode": "none",
              "query": {
                "query_string": {
                  "query": "(activity_areas.kind:city AND activity_areas.id:554782) OR (activity_areas.kind:district AND activity_areas.id:3100) OR (activity_areas.kind:region AND activity_areas.id:19)"
                }
              }
            }
          }
        ]
      }
    }
  }
}

nested_filters.json

{
  "query": {
    "filtered": {
      "query": {
        "filtered": {
          "query": {
            "filtered": {
              "query": {
                "match_all": {}
              },
              "filter": {
                "nested": {
                  "path": "activity_areas",
                  "score_mode": "none",
                  "query": {
                    "query_string": {
                      "query": "(activity_areas.kind:city AND activity_areas.id:554782) OR (activity_areas.kind:district AND activity_areas.id:3100) OR (activity_areas.kind:region AND activity_areas.id:19)"
                    }
                  }
                }
              }
            }
          },
          "filter": {
            "query": {
              "query_string": {
                "query": "keyword_phrases:\"instalatér\""
              }
            }
          }
        }
      },
      "filter": {
        "term": {
          "situation_ids": "1"
        }
      }
    }
  },
  "size": 9999
}