Perhaps you should try some spelling variations:
petruuow » petrow (Expand Search), peteruuow (Expand Search), petruuuow (Expand Search), peruuow (Expand Search)
perw » per (Expand Search), verw (Expand Search)
petruow » peteruow (Expand Search), petruuow (Expand Search), peruow (Expand Search)
petr » peter (Expand Search), petru (Expand Search), per (Expand Search)
petro » petero (Expand Search), petruo (Expand Search), pero (Expand Search), petrov (Expand Search), petru (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), peri (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 petruuow) OR (perw OR petr)) o) OR (((petro OR peterov) OR petri) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruow OR petruuow) OR (perw OR petr)) o) OR (((petro OR peterov) OR petri) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruow OR petruuow) OR (perw OR petr)) o) OR (((petro OR peterov) OR petri) _)). s.*.