Perhaps you should try some spelling variations:
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
petroi » peteroi (Expand Search), petrooi (Expand Search), peroi (Expand Search), petro (Expand Search), petrov (Expand Search), petrow (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search)
peters » peter (Expand Search), petersen (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 petru) OR (((((petri OR petroi) OR peteri) OR petroi) OR peters) OR peters)) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petr OR petru) OR (((((petri OR petroi) OR peteri) OR petroi) OR peters) OR peters)) _. s.*.