Perhaps you should try some spelling variations:
petrouuv » petrov (Expand Search), peterouuv (Expand Search), petriouuv (Expand Search), petruouuv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrv » peterv (Expand Search), petriv (Expand Search), petruv (Expand Search)
petruuuv » peteruuuv (Expand Search), petriuuuv (Expand Search), petruuuuv (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (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 ((petriov OR (petrv OR (petruuuv OR petrouuv))) OR ((peteri OR petroi) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR (petrv OR (petruuuv OR petrouuv))) OR ((peteri OR petroi) OR petr)) o.s.*".