Hello A.Ley,
Thank you for using Apple Support Communities.
I understand from your post that you would like to know how to search for a file in iCloud Drive without having to look through all the files. I know how it can be to have so many files to search through. From what I can tell from your post, it looks like you are using iCloud Drive for Windows.
If this is correct, I recommend using the search box located in the upper right corner of the File Explorer window. Click on iCloud Drive and then type in your search criteria in the search box. It should bring up any documents with the same name in the iCloud Drive folder.
If you are using a Mac, you can use the Spotlight search feature to find files. Click the magnifying glass in the upper-right corner of your Mac and type in your search criteria. It will bring up a list of items that meet the criteria. The following article has additional information about how Spotlight search works:
Mac Basics: Spotlight helps you find what you‘re looking for
Best Regards