Perhaps you should try some spelling variations:
petruow » petrow (Expand Search), peteruow (Expand Search), petruuow (Expand Search), petrouow (Expand Search)
petruw » petru (Expand Search), petrow (Expand Search), peteruw (Expand Search), petruuw (Expand Search), petrouw (Expand Search)
petrovw » petrov (Expand Search), petrow (Expand Search), peterovw (Expand Search), petruovw (Expand Search), petroovw (Expand Search)
petruvw » peteruvw (Expand Search), petruuvw (Expand Search), petrouvw (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petrou » peterou (Expand Search), petruou (Expand Search), petroou (Expand Search), petru (Expand Search), petro (Expand Search), petrov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((((petruow OR petruw) OR (petrovw OR petruvw)) o) OR ((petr OR (petrou OR petri)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruow OR petruw) OR (petrovw OR petruvw)) o) OR ((petr OR (petrou OR petri)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruow OR petruw) OR (petrovw OR petruvw)) o) OR ((petr OR (petrou OR petri)) _)). s.*.