Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruiiiov » peteruiiiov (Expand Search), petriuiiiov (Expand Search), petruuiiiov (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (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 (((((petruov OR petrov) OR petriov) OR peteriv) OR petruiiiov) OR (petriio OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((((petruov OR petrov) OR petriov) OR peteriv) OR petruiiiov) OR (petriio OR petr)) o.s.*".