Perhaps you should try some spelling variations:
petruiv » petriv (Expand Search), pentruiv (Expand Search), petriiv (Expand Search), petriuiv (Expand Search), petrouiv (Expand Search), peruiv (Expand Search)
petrui » petri (Expand Search), pentrui (Expand Search), petrii (Expand Search), petriui (Expand Search), petroui (Expand Search), perui (Expand Search)
petru » pentru (Expand Search), petri (Expand Search), petriu (Expand Search), petrou (Expand Search), peru (Expand Search)
petroi » petri (Expand Search), petro (Expand Search), petrov (Expand Search), petrioi (Expand Search), petrooi (Expand Search), peroi (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 ((peruov OR (periv OR petruiv)) OR ((petrui OR (petru OR petroi)) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peruov OR (periv OR petruiv)) OR ((petrui OR (petru OR petroi)) OR (petr OR peter))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peruov OR (periv OR petruiv)) OR ((petrui OR (petru OR petroi)) OR (petr OR peter))) o.s.*.