Search-Engines

Hello there,

I got a problem with the search query.
I’m creating a website with a search option for finding company’s and products etc.

Now is the problem, whenever I search on everything, for example this: .
He keeps finding every post I did.
This is ofcourse not what I want, whenever I search for a dott, wordpress isn’t allowed to find any posts.
Atleast.. that’s what I want.
he only needs to find posts on keywords..

Can someone help me on how I need to do this or has a plugin for it?

Thanks a lot!