If you have a site that uses Visual Composer, you’ll find that some links, particularly button links aren’t found when using some of the popular find & replace plug-ins like Velvet Blues.

If you look in the database, Visual Composer URLs are encoded. The Better Search and Replace plugin allows you to search for encoded URLs and replace them with encoded URLs.

And here’s a handy tool from Eric Meyer for encoding / decoding links:
http://meyerweb.com/eric/tools/dencoder/