Perhaps you should try some spelling variations:
petruiov » petrov (Expand Search), peteruiov (Expand Search), petriuiov (Expand Search), petruuiov (Expand Search)
petroiov » petrov (Expand Search), peteroiov (Expand Search), petrioiov (Expand Search), petruoiov (Expand Search)
petrooiov » peterooiov (Expand Search), petriooiov (Expand Search), petruooiov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruio » peteruio (Expand Search), petriuio (Expand Search), petruuio (Expand Search)
petruuoio » peteruuoio (Expand Search), petriuuoio (Expand Search), petruuuoio (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 ((petruiov OR (petroiov OR petrooiov)) OR ((petroi OR (petruio OR petruuoio)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiov OR (petroiov OR petrooiov)) OR ((petroi OR (petruio OR petruuoio)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruiov OR (petroiov OR petrooiov)) OR ((petroi OR (petruio OR petruuoio)) OR petr)) o.s.*.