Crawled site not in index and search returns nothing


I’ve selected to crawl , for ex:

I get a green check mark, so I guess it’s ok to proceed.

Crawl depth is 3 and “Restrict to start domain(s)” is selected.

Yet the process of crawling is finished, there’s no entry in my “index browser” and search returns nothing.

Something similar happens for example . It says it’s finished but if I do a research that I know exists on that site, it returns nothing.

What could be wrong?