Query autocompletion has been the most popular feature in the history of Google Custom Search. Google announced that you can now control inclusions and exclusions to autocompletions. For e.g., on sample restaurant review search engine, typing "che" triggers autocompletion for "cheese" and not "cheese jalapeno poppers". Typing "chicken' uncover "chicken livers" (ugh!) but didn't "chicken tandoori".
With "inclusion and exclusion" options in control panel, managing autocompletions is a breeze: just add "cheese" and "chicken livers" to exclusions, and insert "chicken tandoori" and "cheese jalapeno poppers" into the included autocompletion list.
After few hours of processing, the new autocomplete modifications kick in:
You can even upload included and excluded autocompletions in bulk in the control panel.