Perhaps you should try some spelling variations:
petruv » petrov (Expand Search), pentruv (Expand Search), petriv (Expand Search)
per » petr (Expand Search)
petruuv » pentruuv (Expand Search), petriuv (Expand Search)
petru » pentru (Expand Search), petri (Expand Search)
petrui » pentrui (Expand Search), petrii (Expand Search), petri (Expand Search)
petruuuo » pentruuuo (Expand Search), petriuuo (Expand Search)
petroi » petri (Expand Search), petro (Expand Search), petrov (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 ((petruv OR petruuv) OR ((((per OR petru) OR (petroi OR petrui)) OR petruuuo) OR peter)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR petruuv) OR ((((per OR petru) OR (petroi OR petrui)) OR petruuuo) OR peter)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruv OR petruuv) OR ((((per OR petru) OR (petroi OR petrui)) OR petruuuo) OR peter)) o.s.*.