How to cull duplicates from Spotlight search

Goal: I want to search a external partition for files/folders named or containing one or more of a couple of words and then copy those files to a different location (folder).

Situation: Spotlight search pulls up duplicate files with duplicate names, which I expected. What I don't want is to copy duplicates.

Problem: Dragging results from Spotlight to the new location copies everything, renaming the dupes (for example: two copies of myfile.doc copy over as...

How to cull duplicates from Spotlight search