Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrooiov » peterooiov (Expand Search), petriooiov (Expand Search), petruooiov (Expand Search)
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petruiiv (Expand Search)
petroio » peteroio (Expand Search), petrioio (Expand Search), petruoio (Expand Search)
petroiio » peteroiio (Expand Search), petrioiio (Expand Search), petruoiio (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((petriov OR petrooiov) OR petriiv) OR (((petroio OR petroiio) OR peteru) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriov OR petrooiov) OR petriiv) OR (((petroio OR petroiio) OR peteru) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petriov OR petrooiov) OR petriiv) OR (((petroio OR petroiio) OR peteru) OR petr)) o.s.*.