Perhaps you should try some spelling variations:
petruov » petrov (Expand Search), pentruov (Expand Search), petriov (Expand Search), peteruov (Expand Search), petriuov (Expand Search), petrouov (Expand Search)
petruv » petrov (Expand Search), pentruv (Expand Search), petriv (Expand Search), peteruv (Expand Search), petriuv (Expand Search), petrouv (Expand Search)
peterv » peter (Expand Search), peters (Expand Search)
petru » pentru (Expand Search), petri (Expand Search), peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrou » petro (Expand Search), petrov (Expand Search), petrow (Expand Search), peterou (Expand Search), petriou (Expand Search), petroou (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 (((petruov OR petruv) OR (peterv OR (petru OR (petrou OR peteroou)))) OR (petr OR per)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruov OR petruv) OR (peterv OR (petru OR (petrou OR peteroou)))) OR (petr OR per)) o.s.*".