GET /some-index/_search
{
  "query": {
    "query_string": {
      "query": "running scissors",
      "fields": ["comment", "comment.plain^10"]
    }
  },
  "highlight": {
    "order": "score",
    "fields": {
      "comment": {
        "matched_fields": ["comment", "comment.plain"],
        "type" : "fvh"
      }
    }
  }
}