Perhaps you should try some spelling variations:
petero » peter (Expand Search), peters (Expand Search)
petriov » peteriov (Expand Search), periov (Expand Search)
petrov » peterov (Expand Search), perov (Expand Search)
petro » petero (Expand Search), pero (Expand Search)
petriuo » peteriuo (Expand Search), periuo (Expand Search)
petr » peter (Expand Search), per (Expand Search)
petru » peteru (Expand Search), peru (Expand Search), pentru (Expand Search)
petri » peteri (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 petrov) OR (((petro OR petero) OR petriuo) OR (petr OR (petru OR petri)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR petrov) OR (((petro OR petero) OR petriuo) OR (petr OR (petru OR petri)))) o.s.*".