1. tdd-01-loi-gioi-thieu.mp3 2. tdd-02-phan-mo-dau.mp3 3. tdd-03-hoi-dap.mp3 4. tdd-04-chuong-1.mp3 5. tdd-05-chuong-2.mp3 6. tdd-06-vo-minh.mp3 7. tdd-07-chuong-3.mp3 8. tdd-08-chuong-4.mp3 9. tdd-09-chuong-5.mp3 10. tdd-10-phu-luc-1.mp3 11. tdd-11-phu-luc-2.mp3 12. tdd-12-su-that-vngc-kho-dau.mp3 13. tdd-13-su-that-vscdc-kho-dau.mp3