Lyrster is a search engine that appears to search only collections of lyrics to songs. Just type in a few words and your results show links to the complete lyrics.
It performed quite well in my tests. The sites it searches include ones I’ve posted highly about in the past. Singing songs is a great way to help English Language Learners get past their understandable reluctance to speak in a new language, and a good vocabulary-building activity.
I’m adding it to my website under Movies and Music For ESL on my website. You can find links to other lyrics sites there, too.