Perhaps you should try some spelling variations:
petrouv » petrov (Expand Search), peterouv (Expand Search), petroouv (Expand Search)
petruiv » pentruiv (Expand Search), peteruiv (Expand Search), petrouiv (Expand Search)
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search)
petruo » pentruo (Expand Search), petro (Expand Search), peteruo (Expand Search), petrouo (Expand Search)
pero » petro (Expand Search), pro (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search)
petr » peter (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 ((petrouv OR petruiv) OR ((((petru OR pero) OR petri) OR petruo) OR (petr OR per))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrouv OR petruiv) OR ((((petru OR pero) OR petri) OR petruo) OR (petr OR per))) o.s.*".