I am deeply grateful to all those who contributed to my thesis in many ways, including their critical comments and ideas as well as their wholehearted encouragements and supports.

First of all, I would like to express my special thanks to my supervisor, Mrs Nguyen Thi Hong Hai (M.A) for her great support, guidance and precious advice during my process of thesis writing. The thesis is impossible to be fulfilled without her help.

I also feel indebted to all of my teachers in Hanoi Foreign Trade University for their valuable lectures given to the students including me during the time we study at the university.

Heart-felt thanks are extended to the Faculty of Business English who has provided me a good chance to study this topic.

Many thanks also go to all staffs of Hanoi Foreign Trade University Library, the Vietnam Development Information Center, and the Vietnam dairy products joint-stock company….who enthusiastically provided me with materials and data related to the topic.