Perhaps you should try some spelling variations:
perov » petrov (Expand Search)
petruiv » peteruiv (Expand Search), petriuiv (Expand Search), petrouiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petroio (Expand Search)
petroio » peteroio (Expand Search), petrioio (Expand Search), petrooio (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petroiio (Expand Search)
petr » peter (Expand Search), petri (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 (petruiv OR ((((pero OR petru) OR ((petrio OR petroio) OR petriio)) OR perov) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petruiv OR ((((pero OR petru) OR ((petrio OR petroio) OR petriio)) OR perov) OR petr)) o.s.*".