Go to your Google Account
Open My Activity
Sign in if prompted
Click Delete
Select Delete activity by
Choose the time range you want to remove
Select Search
Confirm the deletion
To delete individual searches, find the item in My Activity
Click the delete icon next to the item
To stop saving future searches, open Activity controls
Turn off Web & App Activity
To clear search history in Chrome, open Chrome settings
Go to Privacy and security
Click Clear browsing data
Select Browsing history
Choose the time range
Click Clear data