Perhaps you should try some spelling variations:
petrov » peterov (Expand Search), petriov (Expand Search), petroov (Expand Search)
petriiuuov » peteriiuuov (Expand Search), petriiiuuov (Expand Search), petroiiuuov (Expand Search)
petriiiuuov » peteriiiuuov (Expand Search), petriiiiuuov (Expand Search), petroiiiuuov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petroou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 (petrov OR (petriiuuov OR petriiiuuov))) OR ((petru OR petrou) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR (petrov OR (petriiuuov OR petriiiuuov))) OR ((petru OR petrou) OR petr)) o.s.*".