how can i add a google search box to dolphin?

I wanna add a google search box of google and was wondering how i can do that 

Will the Google site search do what you want?

Have you installed the module?

/m/google_search/administration/

or,

https://support.google.com/customsearch/answer/2630969?hl=en

Hi,

I added the google search code as banner to the site.

i don't know any other way to do it