Search a Site That Has No Search Box
“site:” causes Google to restrict its search results to pages from the site you specify.
For example, searching for “site:askleo.com word” will return results only from askleo.com1.
In addition to just searching for whatever words you throw into Google’s search box,
there are a number of special instructions you can include. They’re called “search operators”.
Google has a handy list.
Even when a site has a search function of its own, using Google often gets me better results, or at least presents a different view on those results
“Site:” is actually a pretty interesting tool to find out if a site has been indexed by Google at all.
Just search for nothing, using the site: operator.
If there are results, then the site is in the Google index. If there’s nothing, it’s not.
This can happen for new sites that are waiting for Google to discover them and get indexed.
By the way, the results count shouldn’t be taken as accurate. It’s an approximation
at best, and can be off by quite a bit, particularly for large sites.