The message/reply screen perhaps can have more information to put in it (drop downs). Such as supplying the Printer model, OS, Softwares etc. So when searches are done they can limit the search to those catagories. For instance. when i want to search for Xerox 800/1000/i models i could select that as a limiter and the particular board i'm in will remove all subjects that do not pertain to that model. Your search box does something similar but is limited.
Thank you for the suggestion. I will look into search filtering and see if there is anything we can add to make the search better.