You can find the Search function on your Jobs in the 'Office' tab. You can search by address, postcode, customer's name, job type, job id, etc.
If you want to Sort your jobs you can do so by clicking on the down/up arrows icon at the top right π . You will be able to sort your jobs by Date added (earliest or latest first), Booking Date (on your 'booked' jobs), by Postcode (alphabetically). You can also sort your jobs by job type.