you need all the ones you should have anyway: polio, tetanus, diphtheria, hep A, typhoid, MMR. There are no special ones such as yellow fever etc to my knowledge.
some of Thailand is malarial so research that. All of it is a dengue fever zone, so 24/7 insect repellent, and it is also a rabies area. I don't think there is a need for a rabies jab unless you are working with animals, but stay well away from all mammals.