Perhaps you should try some spelling variations:
petruiv » pentruiv (Expand Search), peteruiv (Expand Search), petrouiv (Expand Search), peruiv (Expand Search)
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petrui » pentrui (Expand Search), peterui (Expand Search), petroui (Expand Search), perui (Expand Search)
pero » petro (Expand Search), per (Expand Search), pro (Expand Search)
petriiv » peteriiv (Expand Search), petroiiv (Expand Search), periiv (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 ((petruiv OR petriiv) OR ((((petru OR pero) OR petrui) OR perio) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiv OR petriiv) OR ((((petru OR pero) OR petrui) OR perio) OR (petr OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruiv OR petriiv) OR ((((petru OR pero) OR petrui) OR perio) OR (petr OR petri))) o.s.*.