Perhaps you should try some spelling variations:
petrioov » petrov (Expand Search), peterioov (Expand Search), petriioov (Expand Search), petroioov (Expand Search)
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petroiiv (Expand Search)
petriiiv » peteriiiv (Expand Search), petriiiiv (Expand Search), petroiiiv (Expand Search)
petroiv » peteroiv (Expand Search), petrioiv (Expand Search), petrooiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (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 ((((petriiv OR petriiiv) OR petroiv) OR peteriv) OR ((petru OR petrioov) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriiv OR petriiiv) OR petroiv) OR peteriv) OR ((petru OR petrioov) OR petr)) o.s.*".