Choose service type. If no service type is selected, this field makes no filtering. If the selected service type has subtypes, all those will be returned. Choose the appropriate settlement, county or primer district. These fields are connected by "AND", so any senseless combination results an empty list. Default empty field means "all", so if this is set, all the services will be listed (unless the district field provides filtering - see below). Select the district. This can also be left blank in this case no filtering occurs for districts. District only makes sense if any settlement is chosen.