Perhaps you should try some spelling variations:
petruuov » petrov (Expand Search), peteruuov (Expand Search), petriuuov (Expand Search), petruuuov (Expand Search)
petrivov » petrov (Expand Search), peterivov (Expand Search), petriivov (Expand Search), petruivov (Expand Search)
petruvov » petrov (Expand Search), peteruvov (Expand Search), petriuvov (Expand Search), petruuvov (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petru (Expand Search), petero (Expand Search), petrio (Expand Search), petruo (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petruuo » peteruuo (Expand Search), petriuuo (Expand Search), petruuuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((petruuov OR (petrivov OR petruvov)) OR (petrui OR ((petro OR petruuo) OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuov OR (petrivov OR petruvov)) OR (petrui OR ((petro OR petruuo) OR petr))) o.s.*".