Ecshop Vietnam Application Error

The application could not run because of the following error:

Type: E_NOTICE [8]

Message: Undefined variable: params in /home/alpmvedn/public_html/modules/search.php

Line: 41

Stack trace:

#0 /home/alpmvedn/public_html/modules/search.php(41): ErrorHandler->handleError(8, 'Undefined varia...', '/home/alpmvedn/...', 41, Array)
#1 /home/alpmvedn/public_html/index.php(33): include_once('/home/alpmvedn/...')
#2 {main}