help needed how to do this in search engine

Hello,

please help me with this topic i am unable to know how to get this when we search for a pirticular word. In img i have given example of bhw search in google. how can i get other web page under main url. i will be thankful if some one can help me out.

I think from Google, by google there is video explaining on how to do this. not sure where I saw it, but its from Google (SEO) videos. and I heard google love it

can any one please specify more details on it