Search Docs in Google Drive With a Collaborator to Find Shared Files
Google Drive has a handy Shared with Me tab for finding documents that you can access but don’t own. However, there are also several hidden search operators that can help you narrow down your documents by contributors.
As the Make Use Of Tips site points out, you can use the owner: search operator to search Drive documents based on the name or email address of the person who owns the document. You can also use the to: operator to filter documents based on the person you shared the document with.
How to Use a Collaborator to Search for Documents in Google Drive | Use