SEO keywords

Hi,
I set up a website with Yoast, my site has 8 pages,
I would like to know if each page has their different content,
Google will find out more keywords ?
Now my focus keyphrase on the home page that Google takes it on the good position ( first page of google), So I will make the different keyphrase and contents on my another pages, will Google take it to indexe ?
thank you for your reply!