Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruuiov » peteruuiov (Expand Search), petriuuiov (Expand Search), petruuuiov (Expand Search)
petruuuuiov » peteruuuuiov (Expand Search), petriuuuuiov (Expand Search), petruuuuuiov (Expand Search)
petruuiv » peteruuiv (Expand Search), petriuuiv (Expand Search), petruuuiv (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (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 ((((peterov OR petriov) OR (petruuiov OR petruuuuiov)) OR petruuiv) OR (petrio OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((peterov OR petriov) OR (petruuiov OR petruuuuiov)) OR petruuiv) OR (petrio OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((peterov OR petriov) OR (petruuiov OR petruuuuiov)) OR petruuiv) OR (petrio OR petr)) o.s.*.