Perhaps you should try some spelling variations:
petruw » petru (Expand Search), petrow (Expand Search), peteruw (Expand Search), petriuw (Expand Search), petruuw (Expand Search)
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), petrov (Expand Search)
pero » petro (Expand Search), pro (Expand Search)
peteru » peter (Expand Search), petru (Expand Search), peters (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), petri (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((petruw OR (petr OR per)) o) OR (((pero OR peteru) OR ((peteri OR petroi) OR peteri)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruw OR (petr OR per)) o) OR (((pero OR peteru) OR ((peteri OR petroi) OR peteri)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruw OR (petr OR per)) o) OR (((pero OR peteru) OR ((peteri OR petroi) OR peteri)) _)). s.*.