Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriiuuov » peteriiuuov (Expand Search), petriiiuuov (Expand Search), petruiiuuov (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (Expand Search)
petruiiiio » peteruiiiio (Expand Search), petriuiiiio (Expand Search), petruuiiiio (Expand Search)
petriuiio » peteriuiio (Expand Search), petriiuiio (Expand Search), petruiuiio (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 petriiuuov) OR (((petriio OR petruiiiio) OR petriuiio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR petriiuuov) OR (((petriio OR petruiiiio) OR petriuiio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriov OR petriiuuov) OR (((petriio OR petruiiiio) OR petriuiio) OR petr)) o.s.*.