I created one managed property that is called Csearch and this brings true results when I search for <managed property>: <property value>.

I go to Search Center and type this.Csearch:word

I can see the result I want in the querystring. k=Csearch%3Aword

And now I want to add new keywords to this querystring.

For example when I type Csearch:word Sharepointin Search Center, I want to see the sharepoint keyword in a querystring with a new name and the & symbol.

Thanks.