The application conditions for Ph.D. in Thailand are as follows:

1. Educational requirements: Applicants are required to have a bachelor's degree and a master's degree.

2. Language requirements: Applicants are required to have good English proficiency and need to provide TOEFL scores or other English test scores to prove English proficiency. Some schools also require GMAT, GRE or SAT scores.

3. Material requirements: Admission application form, undergraduate diploma and degree certificate, master's diploma and degree certificate, undergraduate and master's transcripts, standard ID photos, passport, physical examination certificate, etc.