No matter what, sooner or later you are going to squirt.
Thailand is much better than it was 30 years ago. So is Cambo.
Just excersize judgement. I dont eat Hoy Kaeng, or Puu, or street sushi, or a handful of salad at a vendors table, and I try to ensure my food is cooked. The last time I spewed though, it was from hot tasty Lad Naar in a nice reputation place, and my Thai friend ate it at the same time and was fine. Were my hands dirty? Did I pick it up earlier?
Its very random, but it strikes.