Perhaps you should try some spelling variations:
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petrivw » peterivw (Expand Search), petruivw (Expand Search), petroivw (Expand Search)
petruuvw » peteruuvw (Expand Search), petruuuvw (Expand Search), petrouuvw (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
peteru » peter (Expand Search), petru (Expand Search)
peters » peter (Expand Search), petersen (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((petri OR (petrivw OR petruuvw)) o) OR (((petr OR (peteru OR peters)) OR peteri) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petri OR (petrivw OR petruuvw)) o) OR (((petr OR (peteru OR peters)) OR peteri) _)). s.*".