Thanks to entrustment lesson and thoughtful recommendations, which received from all teachers of the Hanoi Foreign Trade University so, I have the opportunity and condition to write my Field Study Report.

I owe a debt of gratitude to many people who helped me to complete this Practice Report. I would like to acknowledge the help of all. First of all I would like to express my deepest acknowledgement to my teacher Mrs. Nguyen Thi Minh Hang - for her valuable advice and recommendations. I have enjoyed our discussions and have learned a great deal from you.

I would like to extend my gratitude to Hanoi Foreign Trade University, CSI Division as well as Broad of Director of VISCO for giving me the change to work there and giving all necessary assistance while I had a practice in that office.

I deeply thank Ms. Nguyen Thi Ngoc Diep - Chief of Hanoi Branch-VISCO JSC for your statistical professional guidance and crucial comments.

I sincerely thank all of the board of management of Hanoi Branch for your assistance in my study. Without your support, this work would not have been undertaken.