Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petrioov » petrov (Expand Search), peterioov (Expand Search), petriioov (Expand Search), petroioov (Expand Search)
peru » per (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petrouv (Expand Search)
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petroiuv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((peteriov OR petrioov) OR (petruv OR petriuv)) OR ((pero OR (petru OR peru)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peteriov OR petrioov) OR (petruv OR petriuv)) OR ((pero OR (petru OR peru)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((peteriov OR petrioov) OR (petruv OR petriuv)) OR ((pero OR (petru OR peru)) OR petr)) o.s.*.