Perhaps you should try some spelling variations:
petr » peter (Expand Search), petri (Expand Search), petro (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search), pentru (Expand Search), petri (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petroiu (Expand Search), petri (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petroiv (Expand Search), petri (Expand Search), petrov (Expand Search)
petris » peteris (Expand Search), petriis (Expand Search), petrois (Expand Search), petri (Expand Search)
petrois » peterois (Expand Search), petriois (Expand Search), petroois (Expand Search)
peteroi » peterdi (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 (petr OR ((peteroi OR (petru OR petriu)) OR (petriv OR (petris OR (petrois OR petris))))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petr OR ((peteroi OR (petru OR petriu)) OR (petriv OR (petris OR (petrois OR petris))))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petr OR ((peteroi OR (petru OR petriu)) OR (petriv OR (petris OR (petrois OR petris))))) o.s.*.