Have not been in ITUNES Store in quite awhile but
If it was a function, it would rely on the person or persons who authored the song to insure you did get the same lyrics so to speak.
So, if you didn't know the artist you wanted - or the authors of the song - you would have to sample them until you hit the correct one.
Itunes did grow over time - and if they did have cross reference by authors they may have removed it - on the other hand like searches may have worked because of a limited database at the time - it did seem to start adding songs based on searches that brought up nothing one time - and a month later there they were.
ITUNES has over time added restrictions - for instance at some point - you had to allow this computer on Itunes in order to have itunes synchronize to an IPOD (I purchased about 6 songs on old mac - after migration synchronized fine until they stopped - finally mac allowed more than one device so I could add this one and synchronization started again).
Here are latest restrictions with windows and Mac if you want to burn CD's of your itunes
cant burn cd in itunes
http://support.apple.com/en-us/HT203173
http://support.apple.com/en-us/HT203164
http://support.apple.com/kb/PH12147?viewlocale=en_US&locale=en_US
Important: You can’t burn movies and TV shows purchased from the iTunes Store to a DVD or VCD that plays in a DVD player or to a Video CD.
http://support.apple.com/kb/PH12149?viewlocale=en_US&locale=en_US