Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petr » petri (Expand Search), petro (Expand Search), per (Expand Search)
petru » petriu (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search), petri (Expand Search)
petriu » petriiu (Expand Search), petroiu (Expand Search), periu (Expand Search), petri (Expand Search)
petris » petriis (Expand Search), petrois (Expand Search), peris (Expand Search), petri (Expand Search)
petrii » petriii (Expand Search), petroii (Expand Search), perii (Expand Search), petri (Expand Search)
petrioui » petriioui (Expand Search), petroioui (Expand Search), perioui (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 (peterov OR (((petr OR (petru OR (petriu OR petris))) OR (petrii OR petrioui)) OR peter)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterov OR (((petr OR (petru OR (petriu OR petris))) OR (petrii OR petrioui)) OR peter)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (peterov OR (((petr OR (petru OR (petriu OR petris))) OR (petrii OR petrioui)) OR peter)) o.s.*.