Perhaps you should try some spelling variations:
petroi » petro (Expand Search), petrov (Expand Search), petrow (Expand Search), peteroi (Expand Search), petrooi (Expand Search), peroi (Expand Search)
petruv » petrov (Expand Search), peteruv (Expand Search), petrouv (Expand Search), peruv (Expand Search)
petrv » petrov (Expand Search), petro (Expand Search), petra (Expand Search), peterv (Expand Search), perv (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (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 (((petri OR petroi) o) OR (((petru OR pentru) OR (petruv OR (petrv OR petr))) _)). s.~".
• Adding a wildcard symbol may retrieve word variants: fop (((petri OR petroi) o) OR (((petru OR pentru) OR (petruv OR (petrv OR petr))) _)). s.*.