Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petruuuiv » peteruuuiv (Expand Search), petriuuuiv (Expand Search), petruuuuiv (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruuoi » peteruuoi (Expand Search), petriuuoi (Expand Search), petruuuoi (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 ((petriv OR petruuuiv) OR ((petriiov OR ((petroi OR peteroi) OR petruuoi)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriv OR petruuuiv) OR ((petriiov OR ((petroi OR peteroi) OR petruuoi)) OR petr)) o.s.*".