Perhaps you should try some spelling variations:
petruow » peteruow (Expand Search), petruuow (Expand Search), petrouow (Expand Search)
petrouuow » peterouuow (Expand Search), petruouuow (Expand Search), petroouuow (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petrui » peterui (Expand Search), petruui (Expand Search), petroui (Expand Search)
petruui » peteruui (Expand Search), petruuui (Expand Search), petrouui (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 petrouuow) OR petr) o) OR (((petri OR peteroi) OR (petrui OR petruui)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruow OR petrouuow) OR petr) o) OR (((petri OR peteroi) OR (petrui OR petruui)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruow OR petrouuow) OR petr) o) OR (((petri OR peteroi) OR (petrui OR petruui)) _)). s.*.