I'm not sure what you mean. There isn't a need for a search bar, but if you absolutely 'need' to look at one page and look for an item, there is always the
List of all created pages, along with handy Ctrl + F feature. That's probably the closest you're going to get to having a wiki search bar. Hell, even the forums search bars are broken. I can't even search for the word Elven and have anything pop up.
''Messages matching "Elven"
* sorry, but no messages matched this query; remember that your query string should be space-separated words without plurals (since we're just doing simple stupid keyword matching)''
Unless I'm really retarded.