Custom Query String Negative Word Search

[patagonia]

I am creating a custom category page and have added two product list modules.

The first module has all the items that include "cars 2", like this:c=310137&word="cars 2"

but in the second module, I want to exclude these items and show everything else.
So in the Custom Query String I have written:
c=310137&word="-cars 2", but it didn't work.
This also didn't work: c=310137&word!="cars 2".

Any ideas how to achieve this?