Perhaps you should try some spelling variations:
petrouuv » petrov (Expand Search), peterouuv (Expand Search), petriouuv (Expand Search), petruouuv (Expand Search)
peteriio » peterdi (Expand Search)
petrooouuv » peterooouuv (Expand Search), petriooouuv (Expand Search), petruooouuv (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petroiio » peteroiio (Expand Search), petrioiio (Expand Search), petruoiio (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 ((petrouuv OR petrooouuv) OR ((petroi OR (petroiio OR peteriio)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrouuv OR petrooouuv) OR ((petroi OR (petroiio OR peteriio)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petrouuv OR petrooouuv) OR ((petroi OR (petroiio OR peteriio)) OR petr)) o.s.*.