Search through nest issue

Elastic Stack Elasticsearch
1

this query sent by browser returns 1 hit:

http://x.x.x.x:9200/push_analizer_ita/doc/_search?q=label:"acconti iva"

{
"took": 9,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 4.103368,
"hits": [
{
"_index": "push_analizer_ita",
"_type": "doc",
"_id": "12",
"_score": 4.103368,
"_source": {
"id": "12",
"iddocumento": [
"11689039",
"16637313",
"25995473",
"27108249",
"27108255",
"28110739",
"28262179",
"28262191"
],
"tag": [],
"label": "acconto Iva",
"idleaf": "12"
}
}
]
}
}

i need to do the same query through nest, i tried this code but it does not compile:

ISearchResponse searchResponse = this.Client.Search
(x => x.Query
(
q => q.SimpleQueryString("acconti iva")
)
);

Client is ElasticClient instance.

Any suggestion?

thanks.