Perhaps you should try some spelling variations:
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search), petri (Expand Search), petro (Expand Search), petrow (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petruoiu (Expand Search), petriu (Expand Search), petrou (Expand Search), petrowu (Expand Search)
petroou » peteroou (Expand Search), petrioou (Expand Search), petruoou (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search), petro (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petroov » peteroov (Expand Search), petrioov (Expand Search), petruoov (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petr OR ((petroi OR petroiu) OR (petroou OR ((petrov OR petruov) OR petroov)))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop (petr OR ((petroi OR petroiu) OR (petroou OR ((petrov OR petruov) OR petroov)))) _. s.*.