Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (Expand Search)
peteriov » petrov (Expand Search)
petriiiuov » peteriiiuov (Expand Search), petriiiiuov (Expand Search), petruiiiuov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (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 ((((petriuov OR petriiiuov) OR (petriov OR peteriov)) OR peterov) OR (petruo OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriuov OR petriiiuov) OR (petriov OR peteriov)) OR peterov) OR (petruo OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriuov OR petriiiuov) OR (petriov OR peteriov)) OR peterov) OR (petruo OR petr)) o.s.*.