Perhaps you should try some spelling variations:
petruow » petrow (Expand Search), peteruow (Expand Search), petriuow (Expand Search), petruuow (Expand Search)
petruio » peteruio (Expand Search), petriuio (Expand Search), petruuio (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)
petruiiu » peteruiiu (Expand Search), petriuiiu (Expand Search), petruuiiu (Expand Search)
petrovu » peterovu (Expand Search), petriovu (Expand Search), petruovu (Expand Search), petrov (Expand Search)
peteroi » peterdi (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 (((petruow OR petruio) o) OR (((petr OR (petroi OR peteroi)) OR (petruiiu OR petrovu)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruow OR petruio) o) OR (((petr OR (petroi OR peteroi)) OR (petruiiu OR petrovu)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruow OR petruio) o) OR (((petr OR (petroi OR peteroi)) OR (petruiiu OR petrovu)) _)). s.*.