Perhaps you should try some spelling variations:
petruow » petrow (Expand Search), petruuow (Expand Search), petrouow (Expand Search), peruow (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (Expand Search)
petrui » petruui (Expand Search), petroui (Expand Search), perui (Expand Search), petru (Expand Search)
petruui » petruuui (Expand Search), petrouui (Expand Search), peruui (Expand Search)
petrouui » petruouui (Expand Search), petroouui (Expand Search), perouui (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruow OR (petr OR peter)) o) OR ((petri OR (petrui OR (petruui OR petrouui))) _)). s.~".
• Adding a wildcard symbol may retrieve word variants: fop (((petruow OR (petr OR peter)) o) OR ((petri OR (petrui OR (petruui OR petrouui))) _)). s.*.