For example a want to search "a+b+c" regex word in 1.000.000 page content.

I can get all page content (this mean i download the page content to my pc) from api 

and search it.

But i don't want to download 1.000.000 pages to my pc (because it is very lazy search and too many bandwidth for me and for wikipedia),

i just want search a word from the server side?

Is it possible to search page content from server side and if page contain my words then i get it's title?

i want like this query: https://en.wikipedia.org/w/api.php?action=query&type=iscontainword&regexword=a+b+c&limit=10