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

• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruvw OR petrivvw) o) OR (petro _)). s.~".
• Adding a wildcard symbol may retrieve word variants: fop (((petruvw OR petrivvw) o) OR (petro _)). s.*.