Perhaps you should try some spelling variations:
erato » prato, trato, erate, ersto, eralo, erano
erano » eran, grano
erno » ern, ergo, enno
eras » ers
erat » erst, eral, eran
proto » photo

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: ((((((erato OR erano) OR erno) OR eras) OR erat) OR proto) OR era).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((erato OR erano) or erno) or eras) or erat) or proto) or era)".
• Adding a wildcard symbol may retrieve word variants: ((((((erato OR erano) or erno) or eras) or erat) or proto) or era)*.