Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petra » petru (Expand Search), petro (Expand Search), petre (Expand Search), petera (Expand Search), petrua (Expand Search), petroa (Expand Search)
petrua » petru (Expand Search), peterua (Expand Search), petruua (Expand Search), petroua (Expand Search)
petera » peter (Expand Search), peters (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((peterov OR ((petra OR (petrua OR petera)) OR petr)) OR petri) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR ((petra OR (petrua OR petera)) OR petr)) OR petri) o.s.*".