Perhaps you should try some spelling variations:
petriov » petrov (Expand Search), petroiov (Expand Search), periov (Expand Search)
petru » pentru (Expand Search), petrou (Expand Search), peru (Expand Search)
petrou » petro (Expand Search), petrov (Expand Search), petrow (Expand Search), petroou (Expand Search), perou (Expand Search)
petroio » petrooio (Expand Search), peroio (Expand Search)
petriuo » petroiuo (Expand Search), periuo (Expand Search)
petr » petro (Expand Search), per (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 (petriov OR ((petroio OR ((petru OR petrou) OR petriuo)) OR ((petr OR petri) OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((petroio OR ((petru OR petrou) OR petriuo)) OR ((petr OR petri) OR peter))) o.s.*".