Perhaps you should try some spelling variations:
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petruuov » peteruuov (Expand Search), petriuuov (Expand Search), petruuuov (Expand Search)
petruuuov » peteruuuov (Expand Search), petriuuuov (Expand Search), petruuuuov (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (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 (peterv OR ((petrov OR (petruuov OR petruuuov)) OR ((petrio OR petriuo) OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterv OR ((petrov OR (petruuov OR petruuuov)) OR ((petrio OR petriuo) OR petr))) o.s.*".