This extension places a search box on any page in admin and allows you to search for orders, products, and customers based on various criteria.

Features:
+ Search orders based on order id, invoice number, customer name, company, email, phone, city, state, zip, country, order total, order date, status, etc.
+ Search customers based on customer id, customer name, company, email, phone, email, state, zip, country, customer group, register date, etc.
+ Search products based on product id, product name, model, sku, upc, ean, mpn, isbn, jan, location, quantity, price, status, category, attribute, main image, extra image, manufacturer, etc.
+ Remember search options and result
+ Edit product, customer, and order in popup dialog

Demo:

Opencart 3 Admin

Opencart 2 Admin

Opencart 1.5 Admin