Perhaps you should try some spelling variations:
petr » peter (Expand Search), petri (Expand Search), per (Expand Search)
petro » petero (Expand Search), petrio (Expand Search), pero (Expand Search), petrov (Expand Search), petri (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), periv (Expand Search)
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), periiv (Expand Search)
petrv » peterv (Expand Search), petriv (Expand Search), perv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), peru (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petr o) OR (((petro OR (((petriv OR petriiv) OR peterov) OR petrv)) OR petru) _)). s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petr o) OR (((petro OR (((petriv OR petriiv) OR peterov) OR petrv)) OR petru) _)). s.*.