Perhaps you should try some spelling variations:
petru » pentru (Expand Search), petrou (Expand Search), peru (Expand Search)
petrouv » petrov (Expand Search), petroouv (Expand Search), perouv (Expand Search)
petrio » petris (Expand Search), petro (Expand Search), petroio (Expand Search), perio (Expand Search)
petriuv » petroiuv (Expand Search), periuv (Expand Search)
petroou » petrooou (Expand Search), peroou (Expand Search)
petr » petro (Expand Search), per (Expand Search)
petri » petroi (Expand Search), peri (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 (((petru OR petrouv) OR petriuv) OR (((peter OR petrio) OR petroou) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petru OR petrouv) OR petriuv) OR (((peter OR petrio) OR petroou) OR (petr OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petru OR petrouv) OR petriuv) OR (((peter OR petrio) OR petroou) OR (petr OR petri))) o.s.*.