Adding Books -> Download Metadata -> Search By

I'm a little rusty and setting up my library that I didn't move properly from one computer to another.

I need to add metadata to a pile of books. But lets say I'm doing this one book at a time. For some reason a lot of my books that I added from Kindle, its only reading the mobi-asin number and putting it in the Title field. So I move it to IDs and hit "Download metadata" but since it is only searching for Title and Author it doesn't find anything. How do I get it to search IDs?

Thank you for your help