Perhaps you should try some spelling variations:
petru » pentru (Expand Search), petrou (Expand Search), peru (Expand Search)
petrou » petro (Expand Search), petrov (Expand Search), petrow (Expand Search), petroou (Expand Search), perou (Expand Search)
petrio » petris (Expand Search), petro (Expand Search), petroio (Expand Search), perio (Expand Search)
petrowuiv » petroowuiv (Expand Search), perowuiv (Expand Search)
petri » petroi (Expand Search), peri (Expand Search)
petr » petro (Expand Search), per (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 ((peteriv OR petrowuiv) OR ((((petru OR petri) OR petrou) OR petrio) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriv OR petrowuiv) OR ((((petru OR petri) OR petrou) OR petrio) OR (petr OR peter))) o.s.*".