Perhaps you should try some spelling variations:
petrov » petriv (Expand Search), petruv (Expand Search), petriov (Expand Search), petruov (Expand Search), perov (Expand Search)
petro » petri (Expand Search), petru (Expand Search), petrio (Expand Search), petruo (Expand Search), pero (Expand Search)
petr » petri (Expand Search), petru (Expand Search), per (Expand Search)
petrui » petriui (Expand Search), petruui (Expand Search), perui (Expand Search), petri (Expand Search), petru (Expand Search)
petriv » petriiv (Expand Search), petruiv (Expand Search), periv (Expand Search), petri (Expand Search), petris (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 petrui) OR peter) OR petriv) _)). s.~".
• Adding a wildcard symbol may retrieve word variants: fop (((peteriw OR (petrov OR petro)) o) OR ((((petr OR petrui) OR peter) OR petriv) _)). s.*.