WP all Import function to Replace text in CSV/XML/Excel before import
#Step 1
Find following in snippet.php
$searches = ['Fish Blanket', 'Digi Plaid', 'Rasta'];
And replace with your keywords which you need to find.
Next find following and repalce with your keywords.
$replacements = ['Shrimp Blanket', 'Sgt Bilko Brown', 'Pasta'];
#Step 2 Add edited code to Functional editor of WP All import importing process. Check this for further refrence.
https://www.wpallimport.com/documentation/developers/custom-code/inline-php/