Is it possible to search within a wiki space?
You can search within a particular wiki space by visiting the search page and selecting or entering the relevant space name from the "Space" dropdown in the left sidebar. The wiki search page is located here: https://wiki.illinois.edu/wiki/dosearchsite.action
It is possible also for a space admin to add a live search macro for 'search inside space' directly to their wiki space. The live search macro allows you to add a search box to a wiki page which will search only within that particular wiki space.
The search box with your selected options will now appear on the page. When you start typing in it, some pages
containing the search key will appear in a drop down as you type. Hit enter to view all results.