Perhaps you should try some spelling variations:
erato » prato, erano, trato, ersto, eralo
erno » ern, enno, eno
ergo » ergon, ego, erg
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 (erno OR ergo)) OR eras) OR erat) OR proto) OR era).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((erato or (erno OR ergo)) or eras) or erat) or proto) or era)".
• Adding a wildcard symbol may retrieve word variants: (((((erato or (erno OR ergo)) or eras) or erat) or proto) or era)*.