Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
peteriiu » peterdi (Expand Search)
petruiu » peteruiu (Expand Search), petriuiu (Expand Search), petruuiu (Expand Search)
petriuiu » peteriuiu (Expand Search), petriiuiu (Expand Search), petruiuiu (Expand Search)
petriiiu » peteriiiu (Expand Search), petriiiiu (Expand Search), petruiiiu (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 ((petriiov OR petriiov) OR (((petruiu OR petriuiu) OR (petriiiu OR peteriiu)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiov OR petriiov) OR (((petruiu OR petriuiu) OR (petriiiu OR peteriiu)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriiov OR petriiov) OR (((petruiu OR petriuiu) OR (petriiiu OR peteriiu)) OR petr)) o.s.*.