shared hosting can't ranked in google with 1 keyword

Good shared hosting could rank #1.

- website loading speed is a ranking factor
- your said you have many domains, search engines could track all your domains if you'll host them in one place

I don't want to write more here, keep reading the forum & you'll learn it fast.

SE algorithms are very complicated and ranking depends on many factors they take into account. What is valued more - no one knows.

Web site hosting no longer needs to be a long and tedious search, so you need to do your best in order to choose the right web host.
Everything works fine with centohost.com hosting. Their website is convenient, user friendly and most of all they will get you setup up in a web site hosting package that's both affordable and reliable.