In the process of completing this research paper, I have receided a great deal of
help, guidance and encouragement form many teachers, friends and my family.
First of all, I would like to express my deepest thanks to Ms Le Thi Hong, my
supervisors for their constant and tireless support throughout this study.
Next, I am indebted to MsTran Ngoc Lien, Dean of Foreing Language
Department with her useful advices and ideas. My sincere thanks also go to
other teachers in Foreign Language Department for their lectures and
instructions during the four years which helps me much in completing this
study.