Perhaps you should try some spelling variations:
petriv » petrov (Expand Search), petroiv (Expand Search), periv (Expand Search)
petrio » petro (Expand Search), petroio (Expand Search), perio (Expand Search)
petris » petrois (Expand Search), peris (Expand Search)
petrois » petroois (Expand Search), perois (Expand Search)
petr » petro (Expand Search), per (Expand Search)
petru » petrou (Expand Search), peru (Expand Search), pentru (Expand Search)
petri » petroi (Expand Search), peri (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 (petriv OR (((petris OR petrois) OR petrio) OR ((petr OR peter) OR (petru OR petri)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriv OR (((petris OR petrois) OR petrio) OR ((petr OR peter) OR (petru OR petri)))) o.s.*".