Perhaps you should try some spelling variations:
peri » petri (Expand Search), per (Expand Search)
petriiiuv » peteriiiuv (Expand Search), petriiiiuv (Expand Search), petruiiiuv (Expand Search)
petrv » peterv (Expand Search), petriv (Expand Search), petruv (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petruio » peteruio (Expand Search), petriuio (Expand Search), petruuio (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((petriiiuv OR ((petrv OR petriv) OR peterv)) OR (((petrio OR peri) OR petruio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiiuv OR ((petrv OR petriv) OR peterv)) OR (((petrio OR peri) OR petruio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriiiuv OR ((petrv OR petriv) OR peterv)) OR (((petrio OR peri) OR petruio) OR petr)) o.s.*.