Perhaps you should try some spelling variations:
petriiuuv » peteriiuuv (Expand Search), petriiiuuv (Expand Search), petruiiuuv (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petruuuio » peteruuuio (Expand Search), petriuuuio (Expand Search), petruuuuio (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 ((peteruv OR petriiuuv) OR (((petruo OR (petrio OR petruuuio)) OR petruuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteruv OR petriiuuv) OR (((petruo OR (petrio OR petruuuio)) OR petruuo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteruv OR petriiuuv) OR (((petruo OR (petrio OR petruuuio)) OR petruuo) OR petr)) o.s.*.