PowerShell Log Parser

I would like to be able to use the PowerShell Log Parser to search files for certain error's and have them kick off an alert. The problem is I need it to be able to match on a phrase, and not just a single word. Apparently the PowerShell Log Parser doesn't handle spaces, because it is matching on a single word not the whole phrase. Does anyone have any idea as to how I can do this, either with a modification to the PowerShell script or a different way entirely. I have already opened a ticket with support, but they haven't been helpful as of yet.