Perhaps you should try some spelling variations:
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petruiiv (Expand Search)
petriiuv » peteriiuv (Expand Search), petriiiuv (Expand Search), petruiiuv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruiiuiov » peteruiiuiov (Expand Search), petriuiiuiov (Expand Search), petruuiiuiov (Expand Search)
petriuuov » peteriuuov (Expand Search), petriiuuov (Expand Search), petruiuuov (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 petriiuv) OR (petriov OR petruiiuiov)) OR petriuuov) OR (petruuo OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriiv OR petriiuv) OR (petriov OR petruiiuiov)) OR petriuuov) OR (petruuo OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriiv OR petriiuv) OR (petriov OR petruiiuiov)) OR petriuuov) OR (petruuo OR petr)) o.s.*.