First thing: When searching for costruzioniao google thinks you just misspelled costruzioni. It doesn’t think of it as being an independent search term yet. This should get better with time, especially if you get more links pointing to your domain.
Second thing: Your first screenshot shows a search result with Site links. Google generates them when it thinks direct linking deeper into your page will be helpful for the user. They won’t appear if youmake a search of the kind site:yourdomain.com. If your website has good content pages with a good structure and google is able to recognize it, they will be created eventually. There is no way to force google to do it and you can’t controll it exactly. But there are ways to help google to understand which pages are important. Using Sitemaps/XML Sitemaps and a good semantic link structure within your website helps google to recognise its structure.