[{_id:ObjectId("55663d59148f358b6582d902"),order_no:"123456",results:[{a:"order_info",b:"description",result:"repeat order"},{a:"order_info",b:"date",result:"2022-10-20T23:00:00.000Z"},{a:"customer",b:"name",result:"Mickey Mouse"},{a:"patient",b:"name",result:"Daffy Duck"}]}]

db.collection.find({results:{"$elemMatch":{a:"order_info",$or:[{result:{$gt:"2022-01-01T00:00:00:000Z",$lt:"2099-01-01T"}},{result:"repeat order"}]}}})