Hi Gautham,
Without seeing your Azure Maps calls, it is a bit difficult to know why you have zero results. I recommend starting with one of our samples and then modifying it to meet your needs. Please take a look at https://azuremapscodesamples.azurewebsites.net/?search=Points%20of%20Interest as I think there are a number of great starting options there with full github code you can use.
Sincerely, IoTGirl