[{"createdAt":"2022-04-07T13:18:18Z","expired":false,"responses":[{"id":"header","options":[{"id":"1","text":""}],"textForSearch":null},{"id":"content","options":[{"id":"content test 01","text":"content test 01"},{"id":"content test 02","text":"content test 02"}],"title":"test title","questionType":"selection","textForSearch":null},{"id":"footer","options":[{"id":"negative","text":"Negative"},{"id":"positive","text":"Positive"}],"title":"test title","questionType":"selection","textForSearch":null},{"id":"test_id","options":null,"title":"","questionType":"text","textForSearch":"comentario de test"}]}]

db.collection.find({"responses":{"$elemMatch":{"textForSearch":{$ne:null}}}})