Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petriiuuo » peteriiuuo (Expand Search), petriiiuuo (Expand Search), petruiiuuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop (petriiov OR (((petruov OR ((petruo OR petriuo) OR petriiuuo)) OR peterio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriiov OR (((petruov OR ((petruo OR petriuo) OR petriiuuo)) OR peterio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriiov OR (((petruov OR ((petruo OR petriuo) OR petriiuuo)) OR peterio) OR petr)) o.s.*.