About a year ago, my son typed an item into the Google search box, and ever since then, whenever I go to Google, this item appears, so I select it and type in the new item. How can I clear it permanently?
I am not sure I fully understand the issue. Google uses predictive text to start offering search suggestions once you start typing. Does your son's search term always appear or only when you start a search that begins with the same letter?
try going tools (the little wrench icon), "under the hood" and then clear browsing data. you may want to uncheck the "clear cookies" box but be sure to empty the cache and clear saved form data. Choose "clear data from this period: everything"
if that doesn't work, then clear everything (all boxes checked) for period "everything".