Actually, it is possible to do this, with a little trickery. You need to edit the Finder's preference file to turn on the options that the View Options panel's disabled buttons equate to.
To accomplish this, you need to edit the
com.apple.finder.plist preferences file which should be located in the following folder:
I use Property List Editor.app, which is part of the Xcode developer tools. There are also third-party applications that can do this, though I can't recommend any off the top of my head.
The image below shows the key paths for the search view settings. By default, the
SearchViewSettings > ListViewSettings > columns > size > visible flag is turned off. Check the box, then save your changes. Preferably, you should edit this preference file while the Finder has been quit, but enabling that behavior is a bit more involved. It should be sufficient to save the preference file and then Control-Option-click on the Finder's icon in the Dock and choose Relaunch.
Also note that by default, Spotlight doesn't search for "System files" or invisible items. System items means items that are located in any of the /Library folders. To allow searching for these items, choose Other… in the popup menu of parameters to search for, then add "System files" and "File visibility".