Where to offer Business English or Law classes? (Bangkok)

Hi all, I'm looking to earn some extra cash in Bangkok and I was told tutoring would be my best shot. I don't want to simply teach English. I used to run seminars in Business, Economics and Law for foreign students and I can prepare students for advanced graduate exams such as GRE, GMAT and LSAT amongst others.

Can someone tell me where I should enquire?

Thanks!