1. Log in in to your Google Account by using your Gmail id and Password
2. Now , Click on below link to accessing your Google Web History
3. Go to right side of page click on "Setting"
4. Now click on Turn Off and now your search query is no longer be saved.
If you want to delete your web history then click on "Remove Items". If you want to re-enable your web history then simply go back on setting and click on turn back again.