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