GET /topic/%D9%84%D9%8F%D9%84%D9%8F%D8%B5%D9%91%D8%A8%D9%8F%D9%84%D9%8F%D9%84%D8%B5%D9%91%D8%A8%D9%8F%D8%B1%D8%B1%D9%8B