Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petruuuuiov » peteruuuuiov (Expand Search), petriuuuuiov (Expand Search), petrouuuuiov (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petroiio (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petriiuuo » peteriiuuo (Expand Search), petriiiuuo (Expand Search), petroiiuuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((petriov OR petruuuuiov) OR (((petriio OR petru) OR (peteruuo OR petriiuuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR petruuuuiov) OR (((petriio OR petru) OR (peteruuo OR petriiuuo)) OR petr)) o.s.*".