Perhaps you should try some spelling variations:
petriov » petrov (Expand Search)
pero » petro (Expand Search), per (Expand Search), pro (Expand Search)
petero » peter (Expand Search), peters (Expand Search), petro (Expand Search)
petriu » petru (Expand Search), petris (Expand Search)
peteru » peter (Expand Search), petru (Expand Search), peters (Expand Search)
peteruo » petero (Expand Search), petruo (Expand Search), peterso (Expand Search)
petruo » petru (Expand Search), petro (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 (petriov OR ((((pero OR petero) OR (petriu OR peteru)) OR (petruo OR peteruo)) OR petri)) o.s.~".
• Adding a wildcard symbol may retrieve word variants: fop (petriov OR ((((pero OR petero) OR (petriu OR peteru)) OR (petruo OR peteruo)) OR petri)) o.s.*.