To find all of the products in the price range 10 to 13, OR manufactured by valuesoft:

GET /amazon_products/_search
{
  "query": {
    "constant_score": {
      "filter": {
        "bool": {
          "should": [
            {
              "range": {
                "price": {
                  "gte": 10,
                  "lte": 13
                }
              }
            },
            {
              "term": {
                "manufacturer.raw": {
                  "value": "valuesoft"
                }
              }
            }
          ]
        }
      }
    }
  }
}

Since we want to OR the conditions, we have placed them under should. Since we are not interested in the scores, we have wrapped our bool query inside a constant_score query.