When you click on the default search box available at top of SharePoint Site, you see some default results shown by SharePoint. I want to know the feature that enables/disables this behaviour. And can we customize it further.
I tried going through the Search settings of site collection and Central admin. No luck.
I found a thread for you that has the same need as yours:Avoid default results in Search Result Web Part
He solved the problem by adding
\\{searchboxquery?}to the Search Results Web Parts content source, maybe it's worth a try for you.