Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petroiiov (Expand Search)
petruuuiov » peteruuuiov (Expand Search), petriuuuiov (Expand Search), petrouuuiov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petruiui » peteruiui (Expand Search), petriuiui (Expand Search), petrouiui (Expand Search)
petruuo » peteruuo (Expand Search), petriuuo (Expand Search), petrouuo (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 ((petriiov OR petruuuiov) OR (((petru OR petruiui) OR (peteriiuo OR petruuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiov OR petruuuiov) OR (((petru OR petruiui) OR (peteriiuo OR petruuo)) OR petr)) o.s.*".