GET /topic/%23%E0%B8%9B%E0%B8%B1%E0%B8%99%E0%B8%9B%E0%B8%B1%E0%B8%99%E0%B8%99%E0%B8%B1%E0%B8%A7%E0%B9%80%E0%B8%88%E0%B9%80%E0%B8%88