Perhaps you should try some spelling variations:
peteruov » petrov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petruiuo » peteruiuo (Expand Search), petriuiuo (Expand Search), petruuiuo (Expand Search)
petruuiuiuo » peteruuiuiuo (Expand Search), petriuuiuiuo (Expand Search), petruuuiuiuo (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (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 peteruov) OR (((petriuo OR (petruiuo OR petruuiuiuo)) OR petriio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR peteruov) OR (((petriuo OR (petruiuo OR petruuiuiuo)) OR petriio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriov OR peteruov) OR (((petriuo OR (petruiuo OR petruuiuiuo)) OR petriio) OR petr)) o.s.*.