Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
peteriov » petrov (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petru (Expand Search), petero (Expand Search), petrio (Expand Search), petruo (Expand Search)
peruv » petruv (Expand Search), perv (Expand Search)
peru » petru (Expand Search), per (Expand Search)
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petruiiv (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 peteriov) OR peruv) OR (petriiv OR peruv)) OR ((petro OR peru) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriiov OR peteriov) OR peruv) OR (petriiv OR peruv)) OR ((petro OR peru) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriiov OR peteriov) OR peruv) OR (petriiv OR peruv)) OR ((petro OR peru) OR petr)) o.s.*.