http://www.PhilinBangkok.com In Siam Square by Siam BTS station down Soi 4 is Doo Dee Siam Restaurant which has Thai and Vietnamese food. There is a very large selection of food to choose from and judging by the the people going there and other reviews was going to be good. The Vietnamese dish we had was great I have has it before at another restaurant, it was very fresh and tasty. One thing is you have to write down on the pad of paper what you want so get a waiter to help you as it has to be in Thai.
www.youtube.com/philinbangkok