Perhaps you should try some spelling variations:
petruuiiv » peteruuiiv (Expand Search), petriuuiiv (Expand Search), petruuuiiv (Expand Search)
petruiiuv » peteruiiuv (Expand Search), petriuiiuv (Expand Search), petruuiiuv (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petruuiio » peteruuiio (Expand Search), petriuuiio (Expand Search), petruuuiio (Expand Search)
petriuiio » peteriuiio (Expand Search), petriiuiio (Expand Search), petruiuiio (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 ((petruuiiv OR petruiiuv) OR (((petruov OR (petruuiio OR petriuiio)) OR petero) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuiiv OR petruiiuv) OR (((petruov OR (petruuiio OR petriuiio)) OR petero) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruuiiv OR petruiiuv) OR (((petruov OR (petruuiio OR petriuiio)) OR petero) OR petr)) o.s.*.