Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriou » peteriou (Expand Search), petriiou (Expand Search), petruiou (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petriuoiu » peteriuoiu (Expand Search), petriiuoiu (Expand Search), petruiuoiu (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 (petriov OR ((((petriou OR peteriou) OR (petriu OR petriuoiu)) OR petruo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((((petriou OR peteriou) OR (petriu OR petriuoiu)) OR petruo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriov OR ((((petriou OR peteriou) OR (petriu OR petriuoiu)) OR petruo) OR petr)) o.s.*.