{
  "_id": "58f9c87b5246af0aac145ew",
  "total": 2,
  "patientId": "xxxxxxx",
  "conditions": [
    {
      "verificationStatus": "confirmed",
      "dateRecorded": "2017-03-14",
      "clinicalStatus": "active",
      "description": "Afib"
    },
    {
      "verificationStatus": "confirmed",
      "dateRecorded": "2017-03-14",
      "clinicalStatus": "active",
      "description": "Arterial hypertension"
    }
  ]
}

.find({
       "$and": [
          { "patientId": { $eq: pID } },
          { "conditions.description": { $text: { $search: "diabetes hypertension" }, $caseSensitive: false } }
        ]
})