Perhaps you should try some spelling variations:
petruuv » peteruuv (Expand Search), petriuuv (Expand Search), petruuuv (Expand Search)
petriuuov » peteriuuov (Expand Search), petriiuuov (Expand Search), petruiuuov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petrouuo » peterouuo (Expand Search), petriouuo (Expand Search), petruouuo (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (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 ((petruuv OR petriuuov) OR (((petroi OR petrui) OR (petrouuo OR petriuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuv OR petriuuov) OR (((petroi OR petrui) OR (petrouuo OR petriuo)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruuv OR petriuuov) OR (((petroi OR petrui) OR (petrouuo OR petriuo)) OR petr)) o.s.*.