Perhaps you should try some spelling variations:
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petrioou » peterioou (Expand Search), petroioou (Expand Search), perioou (Expand Search)
petriioou » peteriioou (Expand Search), petroiioou (Expand Search), periioou (Expand Search)
peteru » peter (Expand Search), peters (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((petr OR petri) OR (((petru OR (petrioou OR petriioou)) OR pentru) OR peteru)) _. s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petr OR petri) OR (((petru OR (petrioou OR petriioou)) OR pentru) OR peteru)) _. s.*".