Perhaps you should try some spelling variations:
perov » petrov (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petero (Expand Search), petrio (Expand Search), pero (Expand Search)
peteriiu » peterdi (Expand Search)
petriiiiov » peteriiiiov (Expand Search), petriiiiiov (Expand Search), periiiiov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), peru (Expand Search)
petriiio » peteriiio (Expand Search), petriiiio (Expand Search), periiio (Expand Search)
petr » peter (Expand Search), petri (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 ((perov OR petriiiiov) OR ((((petro OR petru) OR petriiio) OR peteriiu) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((perov OR petriiiiov) OR ((((petro OR petru) OR petriiio) OR peteriiu) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((perov OR petriiiiov) OR ((((petro OR petru) OR petriiio) OR peteriiu) OR petr)) o.s.*.