Safari on iOS 8 adds a new feature, Quick Website Search, that lets you quickly search websites you’ve recently visited directly from the Safari address bar simply by prefixing the search with the website name, such as “imdb” or “wiki.” Unlike the corresponding feature in Safari on OS X, however, there are a couple of tricks to get it working properly.
On OS X, simply visiting a website’s home page in Safari will add it to your Quick Website Search, but for whatever reason, the iOS version of Safari is a little bit more picky in terms of how sites get added to the list. Firstly, you’ll have to actually perform a search on a given website for it to be added to the list, and secondly, not all websites are supported — sites with more complex search forms, for example, will not be detected by iOS Safari and not appear as Quick Website Search options.
You can view a list of sites that have been added by going into the Safari section in your iOS Settings app, and selecting Quick Website Search, and if you decide that there are some here that you don’t want included, you can easily remove them with the standard swipe-to-delete gestures.