Perhaps you should try some spelling variations:
petr » peter (Expand Search), per (Expand Search)
petrov » peterov (Expand Search), perov (Expand Search)
petro » petero (Expand Search), pero (Expand Search)
petri » peteri (Expand Search), peri (Expand Search)
petru » peteru (Expand Search), peru (Expand Search), pentru (Expand Search)
petruuov » peteruuov (Expand Search), peruuov (Expand Search), pentruuov (Expand Search)
peteri » peterdi (Expand Search), peter (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 ((petr OR peteri) OR ((petrov OR ((petro OR petri) OR petru)) OR petruuov)) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petr OR peteri) OR ((petrov OR ((petro OR petri) OR petru)) OR petruuov)) _. s.*.