Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (Expand Search)
petruuov » petrov (Expand Search), peteruuov (Expand Search), petriuuov (Expand Search), petruuuov (Expand Search)
petruuuov » peteruuuov (Expand Search), petriuuuov (Expand Search), petruuuuov (Expand Search)
petriiuuov » peteriiuuov (Expand Search), petriiiuuov (Expand Search), petruiiuuov (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (Expand Search)
petruiio » peteruiio (Expand Search), petriuiio (Expand Search), petruuiio (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 petruuov) OR (petruuuov OR petriiuuov)) OR ((petriio OR petruiio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriuov OR petruuov) OR (petruuuov OR petriiuuov)) OR ((petriio OR petruiio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petriuov OR petruuov) OR (petruuuov OR petriiuuov)) OR ((petriio OR petruiio) OR petr)) o.s.*.