Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petrouv » petrov (Expand Search), petruouv (Expand Search), petroouv (Expand Search), perouv (Expand Search)
petriiuov » petruiiuov (Expand Search), petroiiuov (Expand Search), periiuov (Expand Search)
petruiiuov » petruuiiuov (Expand Search), petrouiiuov (Expand Search), peruiiuov (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 ((((petriiuov OR petruiiuov) OR peterov) OR (peter OR petrouv)) OR (petr OR petri)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriiuov OR petruiiuov) OR peterov) OR (peter OR petrouv)) OR (petr OR petri)) o.s.*".