return inner data in mongoose

My collection data is like this :

{
"_id" : ObjectId("590ad1f747627f86e585a4af"),
"code" : "NL",
"name" : "Holand",
"background" : "https://vfbdt"
"topics" : [ 
    {
        "name" : "overview",
        "facts" : [ 
            {
                "key" : "capital",
                "value" : "Kuala Lumpur"
            }, 
            {
                "key" : "population",
                "value" : "232424234"
            }, 
            {
                "key" : "reliogion",
                "value" : "Islam"
            }
        ]
    }, 
    {
        "name" : "Good to know",
        "facts" : [ 
            {
                "key" : "key1",
                "value" : "value1"
            }
        ]
    }
]
}

I want to return all the facts by filter on name Topic name and code. I write this piece of code but it doesn't work correctly and return all collection just filter by code and does not consider topic.name

 export function getFactsByCodeAndName(req, res, next) {
 Country.find({code:req.params.code,'topics.name':req.params.name})
.exec((err, facts) => {
if (err) return next(err);

return res.status(200).json({
  success: true,
  message: 'Get country',
  data: facts,
     });
   });
}

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