Perhaps you should try some spelling variations:
petriv » peteriv (Expand Search), petriiv (Expand Search), petroiv (Expand Search)
petroiv » peteroiv (Expand Search), petrioiv (Expand Search), petrooiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petroov (Expand Search)
petriioov » peteriioov (Expand Search), petriiioov (Expand Search), petroiioov (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 ((petriv OR petroiv) OR ((petru OR (petrov OR (petriioov OR peteriioov))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriv OR petroiv) OR ((petru OR (petrov OR (petriioov OR peteriioov))) OR petr)) o.s.*".