Yes it can. Simply change "lyrics" keyword in the Preferences dialog to "chords" or "chords -lyrics" (to completely exclude lyrics sites).
You can also put the lyrics keyword switch to the main window by checking appropriate checkbox besides lyrics keyword selector in preferences to make keyword changes even easier.
Remember that for chorsds EvilLyrics uses same cache files as for lyrics, so if you previously searched for lyrics for particular song those cached lyrics are displayed again even if you switch the keyword to "chords". In order to load chords you have to press Reload button.
If you want to keep both lyrics and chords we recommend installing another instance of EvilLyrics in other directory and use one for lyrics and one for chords (different installations ie diffrenet lyrics cache folders)