Perhaps you should try some spelling variations:
petrov » petro (Expand Search), peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petrouv » peterouv (Expand Search), petriouv (Expand Search), petruouv (Expand Search)
petruuv » peteruuv (Expand Search), petriuuv (Expand Search), petruuuv (Expand Search)
petroio » peteroio (Expand Search), petrioio (Expand Search), petruoio (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), petri (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 (((petrouv OR petrov) OR petruuv) OR ((petroio OR perio) OR (petr OR (peteri OR per)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petrouv OR petrov) OR petruuv) OR ((petroio OR perio) OR (petr OR (peteri OR per)))) o.s.*".