Perhaps you should try some spelling variations:
petrovov » petrov (Expand Search), petrovvov (Expand Search), petrivov (Expand Search), petruvov (Expand Search), peterovov (Expand Search), petriovov (Expand Search), petruovov (Expand Search)
peteroov » petrov (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petru (Expand Search), petero (Expand Search), petrio (Expand Search), petruo (Expand Search)
petruiiov » peteruiiov (Expand Search), petriuiiov (Expand Search), petruuiiov (Expand Search)
petruiu » peteruiu (Expand Search), petriuiu (Expand Search), petruuiu (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (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 ((petruiiov OR (petrovov OR peteroov)) OR (petruiu OR ((petro OR petruo) OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiiov OR (petrovov OR peteroov)) OR (petruiu OR ((petro OR petruo) OR petr))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruiiov OR (petrovov OR peteroov)) OR (petruiu OR ((petro OR petruo) OR petr))) o.s.*.