My four years of studying abroad in America have been put in these pages, the records of the impact of culture from the first week, about the difference between the relations in Vietnam and the US, about the way of talking of local students, the way they eat, party, about what I was taught at school and what I have to learn by experience. Although I faced many difficulties when living alone in a foreign country, I am still grateful for the past four years. That time there were enough levels of laughter and enough nuances of loneliness. It is in that loneliness that I truly grow up.