Perhaps you should try some spelling variations:
petrouiv » petrov (Expand Search), peterouiv (Expand Search), petroouiv (Expand Search), perouiv (Expand Search)
petrouuv » petrov (Expand Search), peterouuv (Expand Search), petroouuv (Expand Search), perouuv (Expand Search)
petruiv » peteruiv (Expand Search), petrouiv (Expand Search), peruiv (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
petrio » peterio (Expand Search), petroio (Expand Search), perio (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (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 ((petruiv OR petrouiv) OR ((((petru OR petri) OR (petrio OR perio)) OR petrouuv) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiv OR petrouiv) OR ((((petru OR petri) OR (petrio OR perio)) OR petrouuv) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruiv OR petrouiv) OR ((((petru OR petri) OR (petrio OR perio)) OR petrouuv) OR petr)) o.s.*.