Why Can’t Windows Search Find Results in Two Specific Server Folders?

I'm having a frustrating issue with Windows Search that several users are experiencing. They can't find any search results from two particular folders when searching from their parent directory, even though other folders in the same location work fine.

These folders are on the X: drive, which maps to a local file server, specifically:

* `\local-serverprojectsFolder A`
* `\local-serverprojectsFolder B`

Other folders in the same directory, like `\local-serverprojectsFolder C`, return results as expected. However, when searching from the Projects folder level, no results pop up for Folder A or Folder B. If users go directly into either Folder A or Folder B and run the search, everything returns correctly.

Here's what I've done to troubleshoot:

* Rebuilt the search index on both the file server and the affected workstations.
* Verified that Windows Search works properly when searching directly on the server; all folders, including Folder A and B, return correct results.
* Followed Microsoft's guidance to rebuild Windows Search on affected machines.
* Checked NTFS and share permissions for Folder A and B and confirmed access for users. No differences were found compared to other working folders.
* Made sure that Folder A and B are in the server's indexing scope and that 'Allow files in this folder to have contents indexed in addition to file properties' is checked.
* Examined another user's machine with similar specs, and the same search issue occurs.

One odd detail is that these folders contain parentheses in their names, like 'Folder A (Text)' and 'Folder B (Text)'. I've noticed if there's a specific folder inside either of them that is unique to those folders, searching for that term also returns no results.

Any suggestions would be greatly appreciated!