Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petriiiuiv » peteriiiuiv (Expand Search), petriiiiuiv (Expand Search), petruiiiuiv (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (Expand Search)
petruuio » peteruuio (Expand Search), petriuuio (Expand Search), petruuuio (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 ((((petruv OR peteriov) OR peteruuiov) OR petriiiuiv) OR ((petriio OR petruuio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruv OR peteriov) OR peteruuiov) OR petriiiuiv) OR ((petriio OR petruuio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruv OR peteriov) OR peteruuiov) OR petriiiuiv) OR ((petriio OR petruuio) OR petr)) o.s.*.