How to Clear Google Search History

Steps

1. Click on "Search History" on the Google home page.
   
   
2. Enter your password in the prompt box.
    
3. Click on "Remove items" on the sidebar.
    
4. Click on "clear entire web history" on the top bar of the "remove items" page.
    
5. On the next page, click on "Clear History" button.
    
6. Restart history tracking.
    
   source : www.wikihow.com