Currently, the Sheets view in the application overview does not have search capability. Compare this to the Bookmarks view, which has a Search panel. I would like to suggest adding a Search panel to the Sheets view as well, which will save a lot of time scrolling through hundreds of sheets (especially for administrators who can see all sheets for a published application).
While there are work-arounds, such as CTRL-F for a browser based search, the functionality is seriously lacking, since you still have to use Find Next to skip to the next search result. If we had an actual search feature, the results would be filtered and much easier to browse.