Search for (1) not 1

I have a bunch (1000+) of duplicated files in many sub directories.
All the dups end in (1).<ext>

Windows Explorer and Directory Opus searches for (1) find all files containing 1, ignoring ( and ). Using "(1)" does not help.

And searching for (1).txt still finds 1.txt files.

Any ideas how to make search less "smart"?

Solved using Explorer++ search
Explorer++ - A small and fast file manager for Windows

You can use this string: ~"*(1).*" This should match anything with (1). in it, such as Text (1).txt and Photo (1).jpg

I found this from this Answers page: How do I search for parenthesis&#63; - Microsoft Answers