Perhaps you should try some spelling variations:
petrow » petro (Expand Search), petrowna (Expand Search), petruow (Expand Search), petroow (Expand Search), perow (Expand Search)
petrov » petro (Expand Search), petruov (Expand Search), petroov (Expand Search), perov (Expand Search)
petrvw » petruvw (Expand Search), petrovw (Expand Search), pervw (Expand Search)
petruiw » petruuiw (Expand Search), petrouiw (Expand Search), peruiw (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (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 (((petrvw OR ((petruiw OR petrow) OR petri)) o) OR ((petrov OR (petr OR peter)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petrvw OR ((petruiw OR petrow) OR petri)) o) OR ((petrov OR (petr OR peter)) _)). s.*".