{
  "bool": {
    "should": [
      { "term": { "title": "brown" }},
      { "term": { "title": "fox"   }}
    ]
  }
}

  "bool": {
    "must": [
      { "term": { "title": "brown" }},
      { "term": { "title": "fox"   }}
    ]
  }
}

{
    "should": [
      { "term": { "title": "fox"   }},
      { "term": { "title": "quick" }}
    ],
    "minimum_should_match": 2 <1>
  }
}