... UNSTRUCTURED DATA UNDERGRADUATE THESIS Major: Information Technology Supervisor: Assoc Prof Dr Ha Quang Thuy Co-supervisor: MSc NguyenThu Trang HANOI - 2009 ABSTRACT With the rise of the Internet, ... challenging area Firstly, I would like give my deepest thank to my research advisor, Prof Dr Ha Quang Thuy, who offers me an endless inspiration in scientific research, leading me to this research...