Perhaps you should try some spelling variations:
periov » petriov (Expand Search), perov (Expand Search)
peri » petri (Expand Search), per (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petruoiu (Expand Search)
petriiio » peteriiio (Expand Search), petriiiio (Expand Search), petruiiio (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 (periov OR (((((peri OR petrui) OR petero) OR (petrou OR petroiu)) OR petriiio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (periov OR (((((peri OR petrui) OR petero) OR (petrou OR petroiu)) OR petriiio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (periov OR (((((peri OR petrui) OR petero) OR (petrou OR petroiu)) OR petriiio) OR petr)) o.s.*.