To use find & replace for text your listings, in the library, make your listing selections and click the Bulk Actions button.
The Bulk Actions button will appear towards the top right of your screen once at least one listing is selected.
Choose Library Actions, and then Find & Replace.
Next, add your Find and Replace text and make your selections from Title, Description, Ignore Case, Use Regular Expressions.
Then select Find & Replace.
Note: To find text, the text, including the surrounding code (if applicable) must be the same in every selected listing.