You are not using "Address Line" as documented and it found nothing that matched so an empty collection should be expected. It, addressLine, should not have the postal code or city. There are other fields for those. "Address Line" is part of a structured call not a query call and you are putting too much into the address line so nothing will match.
So you should review https://learn.microsoft.com/en-us/rest/api/maps/search/get-geocoding?view=rest-maps-2025-01-01&tabs=HTTP#uri-parameters
You would use parameters like "addressLine=41%20Kraeizgaass&countryRegion=Luxembourg&postalCode=L-9807&locality=Hosingen" to narrow the search results to the regions within the address.