Perhaps you should try some spelling variations:
petrov » petruv (Expand Search), peterov (Expand Search), petruov (Expand Search), perov (Expand Search)
petro » petru (Expand Search), petero (Expand Search), petruo (Expand Search), pero (Expand Search)
petr » peter (Expand Search), petru (Expand Search), per (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), peri (Expand Search)
petriv » peteriv (Expand Search), petruiv (Expand Search), periv (Expand Search), petris (Expand Search)
peteru » peter (Expand Search), petru (Expand Search), peters (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 (((peteriw OR (petrov OR petro)) o) OR ((((petr OR petri) OR peteru) OR petriv) _)). s.~".
• Adding a wildcard symbol may retrieve word variants: fop (((peteriw OR (petrov OR petro)) o) OR ((((petr OR petri) OR peteru) OR petriv) _)). s.*.