Perhaps you should try some spelling variations:
petroiov » petrov (Expand Search), peteroiov (Expand Search), petruoiov (Expand Search), petrooiov (Expand Search)
peteriov » petrov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petruuo » peteruuo (Expand Search), petruuuo (Expand Search), petrouuo (Expand Search)
petroiuo » peteroiuo (Expand Search), petruoiuo (Expand Search), petrooiuo (Expand Search)
petr » peter (Expand Search), petru (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 ((petroiov OR peteriov) OR ((petri OR ((petruuo OR peteruuo) OR petroiuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petroiov OR peteriov) OR ((petri OR ((petruuo OR peteruuo) OR petroiuo)) OR petr)) o.s.*".