Google now allows “enabling “query autocompletions” for Custom Search search engine. To enable autocompletions, select Enable autocompletions in Basics tab of control panel. After you’ve saved your settings, replace the “search box” code in your website with code from the Get code tab. Please note that it can take a few hours for to start generating autocompletion queries for your search engine. If you’re using Custom Search Element with a theme, autocompletions are styled to match the look & feel of your theme. Autocompletions will also work on high-end mobile devices,” noted Google. “Because the autocompleted queries are based, in part, on the specific content of the webpages covered by your search engine, we’ll not generate autocompletions for CSEs that search entire web, i.e., autocompletions will only work if you set your preferences to Search only included sites in control panel,” explains Google.