Perhaps you should try some spelling variations:
petriov » petrov (Expand Search), petriiov (Expand Search), petroiov (Expand Search), periov (Expand Search)
peteru » peters (Expand Search)
petru » pentru (Expand Search), petri (Expand Search), petriu (Expand Search), petrou (Expand Search), peru (Expand Search)
petroiu » petrioiu (Expand Search), petrooiu (Expand Search), peroiu (Expand Search)
petroou » petrioou (Expand Search), petrooou (Expand Search), peroou (Expand Search)
petr » petri (Expand Search), petro (Expand Search), per (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 ((((peteru OR petru) OR petroiu) OR (peterou OR petroou)) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((((peteru OR petru) OR petroiu) OR (peterou OR petroou)) OR (petr OR peter))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriov OR ((((peteru OR petru) OR petroiu) OR (peterou OR petroou)) OR (petr OR peter))) o.s.*.