Perhaps you should try some spelling variations:
peteri » peter (Expand Search), peters (Expand Search)
petrou » petru (Expand Search), petro (Expand Search), petrov (Expand Search), peterou (Expand Search), petruou (Expand Search), petroou (Expand Search)
petriu » petru (Expand Search), petris (Expand Search), peteriu (Expand Search), petruiu (Expand Search), petroiu (Expand Search)
petruo » petru (Expand Search), petro (Expand Search), peteruo (Expand Search), petruuo (Expand Search), petrouo (Expand Search)
pentruo » pentru (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petr » peter (Expand Search), petru (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 ((petri OR peteri) OR (((petrou OR petriu) OR (petruo OR pentruo)) OR (petr OR peterdi))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petri OR peteri) OR (((petrou OR petriu) OR (petruo OR pentruo)) OR (petr OR peterdi))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petri OR peteri) OR (((petrou OR petriu) OR (petruo OR pentruo)) OR (petr OR peterdi))) o.s.*.