Perhaps you should try some spelling variations:
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petroiiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrouuo » peterouuo (Expand Search), petriouuo (Expand Search), petroouuo (Expand Search)
petruuuo » peteruuuo (Expand Search), petriuuuo (Expand Search), petrouuuo (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petroov (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 peteriuiv) OR (((petru OR (petrouuo OR petruuuo)) OR petrov) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiv OR peteriuiv) OR (((petru OR (petrouuo OR petruuuo)) OR petrov) OR petr)) o.s.*".