Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriiuov » peteriiuov (Expand Search), petriiiuov (Expand Search), petruiiuov (Expand Search)
petruouov » peteruouov (Expand Search), petriuouov (Expand Search), petruuouov (Expand Search)
petruuuouov » peteruuuouov (Expand Search), petriuuuouov (Expand Search), petruuuuouov (Expand Search)
petruuo » peteruuo (Expand Search), petriuuo (Expand Search), petruuuo (Expand Search)
petruoi » peteruoi (Expand Search), petriuoi (Expand Search), petruuoi (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 (((petriov OR petriiuov) OR (petruouov OR petruuuouov)) OR ((petruuo OR petruoi) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriov OR petriiuov) OR (petruouov OR petruuuouov)) OR ((petruuo OR petruoi) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petriov OR petriiuov) OR (petruouov OR petruuuouov)) OR ((petruuo OR petruoi) OR petr)) o.s.*.