Perhaps you should try some spelling variations:
petriov » petrov (Expand Search), peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petru » petri (Expand Search), peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrois » petris (Expand Search), peterois (Expand Search), petriois (Expand Search), petroois (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petrooiu (Expand Search)
petroio » peteroio (Expand Search), petrioio (Expand Search), petrooio (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 (((petru OR petroiu) OR (petrois OR petroio)) OR (petr OR pentru))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR (((petru OR petroiu) OR (petrois OR petroio)) OR (petr OR pentru))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriov OR (((petru OR petroiu) OR (petrois OR petroio)) OR (petr OR pentru))) o.s.*.