Perhaps you should try some spelling variations:
petruuov » petrov (Expand Search), peteruuov (Expand Search), petriuuov (Expand Search), petruuuov (Expand Search)
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
peteriio » peterdi (Expand Search)
petruuuio » peteruuuio (Expand Search), petriuuuio (Expand Search), petruuuuio (Expand Search)
petruiuio » peteruiuio (Expand Search), petriuiuio (Expand Search), petruuiuio (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 petriiov) OR (((peteriio OR peterio) OR (petruuuio OR petruiuio)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuov OR petriiov) OR (((peteriio OR peterio) OR (petruuuio OR petruiuio)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruuov OR petriiov) OR (((peteriio OR peterio) OR (petruuuio OR petruiuio)) OR petr)) o.s.*.