Perhaps you should try some spelling variations:
petroov » petrov (Expand Search), peteroov (Expand Search), petrooov (Expand Search), peroov (Expand Search)
petriu » petris (Expand Search), peteriu (Expand Search), petroiu (Expand Search), periu (Expand Search)
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petrio » petris (Expand Search), petro (Expand Search), peterio (Expand Search), petroio (Expand Search), perio (Expand Search)
petriiu » peteriiu (Expand Search), petroiiu (Expand Search), periiu (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petri » peteri (Expand Search), 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 (petroov OR (((petriu OR petru) OR petriiu) OR (petrio OR (petr OR petri)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petroov OR (((petriu OR petru) OR petriiu) OR (petrio OR (petr OR petri)))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petroov OR (((petriu OR petru) OR petriiu) OR (petrio OR (petr OR petri)))) o.s.*.