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