Perhaps you should try some spelling variations:
petruov » petrov (Expand Search), peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petru (Expand Search), petero (Expand Search), petrio (Expand Search), petruo (Expand Search)
petriuuov » peteriuuov (Expand Search), petriiuuov (Expand Search), petruiuuov (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search), petri (Expand Search), petris (Expand Search), petrov (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 ((((peteriw OR peteriw) OR ((petruov OR petriuuov) OR petro)) o) OR ((petr OR petriv) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((peteriw OR peteriw) OR ((petruov OR petriuuov) OR petro)) o) OR ((petr OR petriv) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((peteriw OR peteriw) OR ((petruov OR petriuuov) OR petro)) o) OR ((petr OR petriv) _)). s.*.