Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petroiiov » peteroiiov (Expand Search), petrioiiov (Expand Search), petruoiiov (Expand Search)
petroooioiiov » peteroooioiiov (Expand Search), petrioooioiiov (Expand Search), petruoooioiiov (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 (petroiiov OR petroooioiiov)) OR ((peteru OR (petruo OR petriuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiov OR (petroiiov OR petroooioiiov)) OR ((peteru OR (petruo OR petriuo)) OR petr)) o.s.*".