Perhaps you should try some spelling variations:
petrooiv » petrov (Expand Search), peterooiv (Expand Search), petriooiv (Expand Search), petroooiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petroiu (Expand Search)
petroiuo » peteroiuo (Expand Search), petrioiuo (Expand Search), petrooiuo (Expand Search)
petriuiuo » peteriuiuo (Expand Search), petriiuiuo (Expand Search), petroiuiuo (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 ((petrooiv OR peterov) OR (((petru OR petriu) OR (petroiuo OR petriuiuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrooiv OR peterov) OR (((petru OR petriu) OR (petroiuo OR petriuiuo)) OR petr)) o.s.*".