Perhaps you should try some spelling variations:
petriiiov » peteriiiov (Expand Search), petriiiiov (Expand Search), petruiiiov (Expand Search)
petruiiiov » peteruiiiov (Expand Search), petriuiiiov (Expand Search), petruuiiiov (Expand Search)
petruoiov » peteruoiov (Expand Search), petriuoiov (Expand Search), petruuoiov (Expand Search)
petruoi » peteruoi (Expand Search), petriuoi (Expand Search), petruuoi (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (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 (((petriiiov OR petruiiiov) OR petruoiov) OR ((petruoi OR petriov) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriiiov OR petruiiiov) OR petruoiov) OR ((petruoi OR petriov) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petriiiov OR petruiiiov) OR petruoiov) OR ((petruoi OR petriov) OR petr)) o.s.*.