Perhaps you should try some spelling variations:
petruw » petrow (Expand Search), pentruw (Expand Search), peteruw (Expand Search), peruw (Expand Search)
petru » pentru (Expand Search), peteru (Expand Search), peru (Expand Search)
petruuo » pentruuo (Expand Search), peteruuo (Expand Search), peruuo (Expand Search)
peterow » petrow (Expand Search)
petr » peter (Expand Search), per (Expand Search)
petro » petero (Expand Search), pero (Expand Search), petrov (Expand Search)
petri » peteri (Expand Search), peri (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 (((((petruw OR petru) OR peterow) OR (petr OR petro)) o) OR ((petruuo OR petri) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((((petruw OR petru) OR peterow) OR (petr OR petro)) o) OR ((petruuo OR petri) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop (((((petruw OR petru) OR peterow) OR (petr OR petro)) o) OR ((petruuo OR petri) _)). s.*.