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)
petrou » petro (Expand Search), petrov (Expand Search), petrow (Expand Search), peterou (Expand Search), petriou (Expand Search), petroou (Expand Search)
petris » petri (Expand Search), peteris (Expand Search), petriis (Expand Search), petrois (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 petrou) OR petroiu) OR (petris 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 petrou) OR petroiu) OR (petris OR petroio)) OR (petr OR pentru))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriov OR ((((petru OR petrou) OR petroiu) OR (petris OR petroio)) OR (petr OR pentru))) o.s.*.