Perhaps you should try some spelling variations:
peteroov » petrov (Expand Search)
petrioov » petrov (Expand Search), peterioov (Expand Search), petriioov (Expand Search), petruioov (Expand Search)
petruuioov » peteruuioov (Expand Search), petriuuioov (Expand Search), petruuuioov (Expand Search)
petriuioov » peteriuioov (Expand Search), petriiuioov (Expand Search), petruiuioov (Expand Search)
petruui » peteruui (Expand Search), petriuui (Expand Search), petruuui (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 ((peteroov OR (petrioov OR (petruuioov OR petriuioov))) OR ((petruui OR peteri) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteroov OR (petrioov OR (petruuioov OR petriuioov))) OR ((petruui OR peteri) OR petr)) o.s.*".