Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriiiiov » peteriiiiov (Expand Search), petriiiiiov (Expand Search), petruiiiiov (Expand Search)
petruiiiov » peteruiiiov (Expand Search), petriuiiiov (Expand Search), petruuiiiov (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((petruov OR (peteriov OR (petriiiiov OR petruiiiov))) OR ((petero OR petrio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR (peteriov OR (petriiiiov OR petruiiiov))) OR ((petero OR petrio) OR petr)) o.s.*".