ACKNOWLEDGEMENTS
i ACKNOWLEDGEMENTS For the completion of this thesis, I have received great assistance and support from many people without whom the word could not have been fulfilled First of all, I would like to express my deepest gratitude to my supervisor, Mr Lê Thế Nghiệp, M.A from Vietnam National University, Hanoi College of Foreign Language, for his valuable instruction, criticism, and his tireless help throughout the thesis preparation My sincere thanks go to all lecturers and the staff of the Department of Post Graduate Studies at Hanoi College of Foreign Language for their useful materials, guidance and enthusiasm during my study at the institution I also wish to thank all the participants in this study for their wholehearted cooperation in giving valuable information Finally, I must admit I am indebted to my family and my friends for their help, consideration and encouragement