Perhaps you should try some spelling variations:
petruow » petrow (Expand Search), peteruow (Expand Search), petruuow (Expand Search), petrouow (Expand Search)
petrio » petris (Expand Search), petro (Expand Search), peterio (Expand Search), petruio (Expand Search), petroio (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petruoi » peteruoi (Expand Search), petruuoi (Expand Search), petrouoi (Expand Search)
petriiu » peteriiu (Expand Search), petruiiu (Expand Search), petroiiu (Expand Search)
petroiu » peteroiu (Expand Search), petruoiu (Expand Search), petrooiu (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 petrio) o) OR ((((petr OR petri) OR petruoi) OR (petriiu OR petroiu)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruow OR petrio) o) OR ((((petr OR petri) OR petruoi) OR (petriiu OR petroiu)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruow OR petrio) o) OR ((((petr OR petri) OR petruoi) OR (petriiu OR petroiu)) _)). s.*.