21 Pham 10, bai so 14-16_ Trung Quan Luan https://langmai.org/wp-content/uploads/2018/12/21-Pham-10-bai-so-14-16_-Trung-Quan-Luan.mp3“21 Pham 10, bai so 14-16_ Trung Quan Luan”.