In 'Settings/Users/Access management', enable the right: 'Display the customer multi-criteria search'.

In the Customers tab, you will find a search box at the top of the page.
Type your customer's name, email, company or customer code to search for your customer.

For an advanced search, click on the 'Advanced search' button.
You will find more criteria to filter your customer database.

You can save your search settings if you tick the box 'Save search'.
In 'Settings/Users/Access management', enable the right: 'manage customer lists'.
In 'Customers/Lists', you will find all saved searches. When you consult a saved search, results are automatically updated.