Extra search field for Reference Number

Almost everything in life is a matter of cost , I didn't ask about that philosopher Nick !
I just ask if you have modify the Search Properties to look like that prntscr.com/hanoyr but doesn't matter now , I saw that you did.
Nice job!
But still beside the custom jobs we re making to our sites the Quick Search Module - or Search module or whatever is, that the OS has to improve.
OS has to make default quick search module rich in features , and repeat my self : with ajax search
Thanks