Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petroiov » petrov (Expand Search), peteroiov (Expand Search), petrioiov (Expand Search), petruoiov (Expand Search)
petrioiov » peterioiov (Expand Search), petriioiov (Expand Search), petruioiov (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 (petroiov OR petrioiov)) OR (((petriu OR peteru) OR petruo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriov OR (petroiov OR petrioiov)) OR (((petriu OR peteru) OR petruo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteriov OR (petroiov OR petrioiov)) OR (((petriu OR peteru) OR petruo) OR petr)) o.s.*.