Go to http://www.evanescencereference.info/
Once you get onto the main page under the picture of the band there's small text that says SONGS click on it! Once you're there click the songs you want, once you have (I don't think hello has music on it) You can click PIANO SHEET MUSIC AND GUITAR TAB it might take a while to load but most of the time they're very accurate but the only transcriber I would 100% trust is Kelly Thomas.