Perhaps you should try some spelling variations:
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petruiiv (Expand Search)
petruiuov » peteruiuov (Expand Search), petriuiuov (Expand Search), petruuiuov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petruuo » peteruuo (Expand Search), petriuuo (Expand Search), petruuuo (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 ((((petriiv OR peteriiiv) OR petruiuov) OR petriv) OR ((petrio OR petruuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriiv OR peteriiiv) OR petruiuov) OR petriv) OR ((petrio OR petruuo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriiv OR peteriiiv) OR petruiuov) OR petriv) OR ((petrio OR petruuo) OR petr)) o.s.*.