Perhaps you should try some spelling variations:
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (Expand Search)
petruoio » peteruoio (Expand Search), petriuoio (Expand Search), petruuoio (Expand Search)
petriuoio » peteriuoio (Expand Search), petriiuoio (Expand Search), petruiuoio (Expand Search)
petruuuoio » peteruuuoio (Expand Search), petriuuuoio (Expand Search), petruuuuoio (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 (petrov OR ((peteri OR (petriio OR ((petruoio OR petriuoio) OR petruuuoio))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petrov OR ((peteri OR (petriio OR ((petruoio OR petriuoio) OR petruuuoio))) OR petr)) o.s.*".