Search for a contact
Add a filter by clicking on the "+" in the filter box. For information, you can add as many filters as you want by clicking on the button again.
Select the field that will allow you to find your contact (his name or email address for example). Then type the name of the contact and click on Validate.
Tip: If you search for your contact using his or her email address, it is not necessary to type the entire email address. If you use the "Contains" option, you can only fill in the beginning of the email address (because it is usually enough information to find your contact), then click on "Validate".