Perhaps you should try some spelling variations:
petru » pentru (Expand Search), petri (Expand Search), petriu (Expand Search), petrou (Expand Search)
petruo » pentruo (Expand Search), petrio (Expand Search), petro (Expand Search), petriuo (Expand Search), petrouo (Expand Search)
petruuo » pentruuo (Expand Search), petriuo (Expand Search), petriuuo (Expand Search), petrouuo (Expand Search)
petrou » petro (Expand Search), petrov (Expand Search), petrow (Expand Search), petriou (Expand Search), petroou (Expand Search)
petrouuo » petrouo (Expand Search), petrovuo (Expand Search), petrowuo (Expand Search), petriouuo (Expand Search), petroouuo (Expand Search)
petr » petri (Expand Search), petro (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 ((petru OR petrou) OR ((petruo OR (petruuo OR petrouuo)) OR ((petr OR per) OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petru OR petrou) OR ((petruo OR (petruuo OR petrouuo)) OR ((petr OR per) OR peter))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petru OR petrou) OR ((petruo OR (petruuo OR petrouuo)) OR ((petr OR per) OR peter))) o.s.*.