Perhaps you should try some spelling variations:
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petruuo » pentruuo (Expand Search), peteruuo (Expand Search), petrouuo (Expand Search), peruuo (Expand Search)
petroou » peteroou (Expand Search), petrooou (Expand Search), peroou (Expand Search)
petroiuo » peteroiuo (Expand Search), petrooiuo (Expand Search), peroiuo (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 ((petru OR peteruv) OR ((petroou OR (petroiuo OR petruuo)) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petru OR peteruv) OR ((petroou OR (petroiuo OR petruuo)) OR (petr OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petru OR peteruv) OR ((petroou OR (petroiuo OR petruuo)) OR (petr OR petri))) o.s.*.