Perhaps you should try some spelling variations:
fonti storiche » note storiche, forme storiche
e letteratura » e literatur
y literatura » la literatura
e digitale » e digital, die digitale, wie digitale
cartaceo » cartacee, cartacei, cartacea

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: fonti storiche ((e letterari) OR (((e letteratura) OR (y literatura)))) – ledizioni cartaceo e digitale.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fonti storiche ((e letterari) or (((e letteratura) OR (y literatura)))) – ledizioni cartaceo e digitale".
• Adding a wildcard symbol may retrieve word variants: fonti storiche ((e letterari) or (((e letteratura) OR (y literatura)))) – ledizioni cartaceo e digitale*.