Perhaps you should try some spelling variations:
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petroi » peteroi (Expand Search), petruoi (Expand Search), petrooi (Expand Search)
petriio » peteriio (Expand Search), petruiio (Expand Search), petroiio (Expand Search)
petruiu » peteruiu (Expand Search), petruuiu (Expand Search), petrouiu (Expand Search)
petriuiu » peteriuiu (Expand Search), petruiuiu (Expand Search), petroiuiu (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 (peterov OR ((((pero OR (petri OR petroi)) OR petriio) OR (petruiu OR petriuiu)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterov OR ((((pero OR (petri OR petroi)) OR petriio) OR (petruiu OR petriuiu)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (peterov OR ((((pero OR (petri OR petroi)) OR petriio) OR (petruiu OR petriuiu)) OR petr)) o.s.*.