Perhaps you should try some spelling variations:
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petroov » peteroov (Expand Search), petruoov (Expand Search), petrooov (Expand Search)
petruov » peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petrv » peterv (Expand Search), petruv (Expand Search), petrov (Expand Search), petru (Expand Search), petro (Expand Search), petra (Expand Search)
petrov » peterov (Expand Search), petruov (Expand Search), petroov (Expand Search), petro (Expand Search)
petriv » peteriv (Expand Search), petruiv (Expand Search), petroiv (Expand Search), petris (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
peters » peter (Expand Search), petersen (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 OR ((petroov OR petruov) OR (((petrv OR petrov) OR peters) OR (petriv OR petri)))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop (petr OR ((petroov OR petruov) OR (((petrv OR petrov) OR peters) OR (petriv OR petri)))) _. s.*.