Perhaps you should try some spelling variations:
petruuov » petrov (Expand Search), peteruuov (Expand Search), petriuuov (Expand Search), petruuuov (Expand Search)
peteriio » peterdi (Expand Search)
petruiio » peteruiio (Expand Search), petriuiio (Expand Search), petruuiio (Expand Search)
petruuiio » peteruuiio (Expand Search), petriuuiio (Expand Search), petruuuiio (Expand Search)
petriui » peteriui (Expand Search), petriiui (Expand Search), petruiui (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 ((petruuov OR petruuov) OR (((peteriio OR (petruiio OR petruuiio)) OR petriui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuov OR petruuov) OR (((peteriio OR (petruiio OR petruuiio)) OR petriui) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruuov OR petruuov) OR (((peteriio OR (petruiio OR petruuiio)) OR petriui) OR petr)) o.s.*.