Perhaps you should try some spelling variations:
petruiv » peteruiv (Expand Search), petruuiv (Expand Search), petrouiv (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petrouv » peterouv (Expand Search), petruouv (Expand Search), petroouv (Expand Search)
petriov » peteriov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petrio » peterio (Expand Search), petruio (Expand Search), petroio (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 (petruiv OR (((petri OR (petrouv OR (petriov OR peteriiov))) OR petrio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petruiv OR (((petri OR (petrouv OR (petriov OR peteriiov))) OR petrio) OR petr)) o.s.*".