Perhaps you should try some spelling variations:
petrov » petro (Expand Search), petruov (Expand Search), petroov (Expand Search), perov (Expand Search)
peteru » petru (Expand Search), peters (Expand Search)
petruoov » petruuoov (Expand Search), petrouoov (Expand Search), peruoov (Expand Search)
petrouv » petruouv (Expand Search), petroouv (Expand Search), perouv (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (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 (((petruoov OR perois) OR (petrov OR petrouv)) OR (((peteru OR peter) OR petr) OR petri)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruoov OR perois) OR (petrov OR petrouv)) OR (((peteru OR peter) OR petr) OR petri)) o.s.*".