Search Functionality help

Hi
I want help regarding the search function of wordpress. Since i show only one post in the index page, the search results are also showing in 1 post-per-page. I want the search function to show many results something like 5 in a page.

I have tried making post in a page to 10 and got the search function showing multiple results in one page but i only want one post in my index page but multiple results in search function
Can anyone help me to fix it.