Perhaps you should try some spelling variations:
petrouuv » petrov (Expand Search), peterouuv (Expand Search), petriouuv (Expand Search), petroouuv (Expand Search)
peri » petri (Expand Search), per (Expand Search)
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petroiiv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petrouo (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 (((petriiv OR petriov) OR petrouuv) OR (((petru OR peri) OR (petruo OR peruo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriiv OR petriov) OR petrouuv) OR (((petru OR peri) OR (petruo OR peruo)) OR petr)) o.s.*".