Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petris » petri (Expand Search), petriis (Expand Search), petrois (Expand Search), peris (Expand Search)
petru » pentru (Expand Search), petri (Expand Search), petriu (Expand Search), petrou (Expand Search), peru (Expand Search)
petruiiuuo » pentruiiuuo (Expand Search), petriiiuuo (Expand Search), petriuiiuuo (Expand Search), petrouiiuuo (Expand Search), peruiiuuo (Expand Search)
petriuuo » petriiuuo (Expand Search), petroiuuo (Expand Search), periuuo (Expand Search)
petr » petri (Expand Search), petro (Expand Search), per (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 petris) OR ((petru OR (petriuuo OR petruiiuuo)) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR petris) OR ((petru OR (petriuuo OR petruiiuuo)) OR (petr OR peter))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterov OR petris) OR ((petru OR (petriuuo OR petruiiuuo)) OR (petr OR peter))) o.s.*.