Perhaps you should try some spelling variations:
petrooov » petrov (Expand Search), peterooov (Expand Search), petriooov (Expand Search), petruooov (Expand Search)
petrioov » petrov (Expand Search), peterioov (Expand Search), petriioov (Expand Search), petruioov (Expand Search)
petruioov » peteruioov (Expand Search), petriuioov (Expand Search), petruuioov (Expand Search)
petriioov » peteriioov (Expand Search), petriiioov (Expand Search), petruiioov (Expand Search)
petriuiu » peteriuiu (Expand Search), petriiuiu (Expand Search), petruiuiu (Expand Search)
petruuou » peteruuou (Expand Search), petriuuou (Expand Search), petruuuou (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 ((petrooov OR ((petrioov OR petruioov) OR petriioov)) OR ((petriuiu OR petruuou) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrooov OR ((petrioov OR petruioov) OR petriioov)) OR ((petriuiu OR petruuou) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petrooov OR ((petrioov OR petruioov) OR petriioov)) OR ((petriuiu OR petruuou) OR petr)) o.s.*.