Q: Bluetooth not finding any devices on my 5s ?

Have the devices you are trying to connect with been paired to the iPhone previously? If not you must put a device in pairing mode in order for the iPhone to connect the first time. Once you do that the devices will appear and connect automatically.

iOS: Supported Bluetooth profiles - Apple Support

these are the bluetooth profiles supported by ios if the bluetooth device you try to pair is not supported it would not work