GET /topic/%23%E0%B8%A1%E0%B8%B4%E0%B8%A7%E0%B8%A8%E0%B8%B8%E0%B8%A0%E0%B8%A8%E0%B8%B4%E0%B8%A9%E0%B8%8F%E0%B9%8C