Need help with %dummy% function

Hi! Sorry to bother you again..

I have this TITLE: One By One ( Bonus Usa )
I want this TITLE: One By One

My action:

Action GUESS VALUES:
%title%
%title% ( Bonus %dummy% )

Only returns what i already had in the start..

Why my action doesnt work as i thought?
Where did i mess up?

I want to erase from the title this: (%anything%Bonus%anything%) with %anything% meanning spaces, letters, symbols...
If this is hard to do or too complex, just tell me why/where my action is wrong!

And once again
Thank you!!!!!!!
Filipe Cruz

Nothing should follow %dummy%

Action GUESS VALUES:
%title%
%title% ( Bonus %dummy%