Perhaps you should try some spelling variations:
petriiuov » peteriiuov (Expand Search), petriiiuov (Expand Search), petruiiuov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petruio » peteruio (Expand Search), petriuio (Expand Search), petruuio (Expand Search)
petruuuio » peteruuuio (Expand Search), petriuuuio (Expand Search), petruuuuio (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 (((petriiuov OR petriov) OR petruv) OR ((peteriuo OR (petruio OR petruuuio)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriiuov OR petriov) OR petruv) OR ((peteriuo OR (petruio OR petruuuio)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petriiuov OR petriov) OR petruv) OR ((peteriuo OR (petruio OR petruuuio)) OR petr)) o.s.*.