How to search Esitmate/Invoice/Sales Order by Salesperson

We have about 20 salesperson and we all help each other to make a sale.

If the customer call salesperson A that he need to modify a order from salesperson B.

How can Sales A find the Salesperson B Esitmate/Invoice/Sales Order in a quicker way? especially we have 20 people.

Is there any search function for salesperson? I only see by date, customer, status etc

Thanks