Pick up a copy of "A Cooks Tour" by Anthony Bourdain. He writes quite eloquently and vividly about his travels in Vietnam and Cambodia. The book is enlightening and funny. There is a program on The Food Channel which follows his travels. I believe they are re-running some episodes now, so you may find the segment on Cambodia. Try logging on to FoodTV.com and searching for Anthony Bourdain, A Cooks Tour.