Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petris » petri (Expand Search), petriis (Expand Search), petruis (Expand Search), petrois (Expand Search)
petruov » petrov (Expand Search), petriuov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petruiiv » petriuiiv (Expand Search), petruuiiv (Expand Search), petrouiiv (Expand Search)
petriiuuv » petriiiuuv (Expand Search), petruiiuuv (Expand Search), petroiiuuv (Expand Search)
petr » petri (Expand Search), petru (Expand Search), petro (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 (((peterov OR (petris OR petruiiv)) OR petriiuuv) OR (petruov OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peterov OR (petris OR petruiiv)) OR petriiuuv) OR (petruov OR (petr OR peter))) o.s.*".