Perhaps you should try some spelling variations:
petruiov » petrov (Expand Search), peteruiov (Expand Search), petriuiov (Expand Search), petruuiov (Expand Search)
peri » petri (Expand Search), per (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruiu » peteruiu (Expand Search), petriuiu (Expand Search), petruuiu (Expand Search)
petruuiu » peteruuiu (Expand Search), petriuuiu (Expand Search), petruuuiu (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 (petriv OR (((((petriov OR petruiov) OR pero) OR (petruiu OR petruuiu)) OR peri) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriv OR (((((petriov OR petruiov) OR pero) OR (petruiu OR petruuiu)) OR peri) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriv OR (((((petriov OR petruiov) OR pero) OR (petruiu OR petruuiu)) OR peri) OR petr)) o.s.*.