Hi, I´m looking for a MBA programs with real good specialization program in Strategy... any ideas?

Any of the top 20 schools will be excellent for strategy.

I don't think this is necessarily a "common" MBA specialization - that's because most MBA programs will inevitably have a lot of content in business strategy.

What are your overall goals?

A few of the schools most specialised on strategy do have formal specialisations (See https://find-mba.com/lists/top-business-school-by-speciality/top-business-schools-for-strategy-or-business-development) but the schools placing the greatest numbers of students into top strategy firms (INSEAD, Harvard Business School, The Wharton School, LSE, Harvard University etc) generally won't.