Is it possible to organize local search on subdomains?

Question

Joomla

Greetings. The essence of the question is this: I created more than 30 ad sites on joomla and djclassifieds. They are "scattered" across subdomains (topic1.domain.ru, theme2.domain.ru, etc.). I would like to somehow organize a search (for example, on the domen.ru page) for ads on all subdomains, without going beyond their sites (including search engines). Maybe there are ready-made solutions?

Answer 1

Sphinx index everything and write down a little dogiki