Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petruovov » peteruovov (Expand Search), petruuovov (Expand Search), petrouovov (Expand Search)
petruvov » peteruvov (Expand Search), petruuvov (Expand Search), petrouvov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petrov » peterov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 ((petruov OR ((petruovov OR petruvov) OR petruvov)) OR (petri OR (petrov OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR ((petruovov OR petruvov) OR petruvov)) OR (petri OR (petrov OR petr))) o.s.*".