Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petroio » peteroio (Expand Search), petrioio (Expand Search), petruoio (Expand Search)
petriuoio » peteriuoio (Expand Search), petriiuoio (Expand Search), petruiuoio (Expand Search)
petriiio » peteriiio (Expand Search), petriiiio (Expand Search), petruiiio (Expand Search)
petruou » peteruou (Expand Search), petriuou (Expand Search), petruuou (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 ((peteriov OR peteriv) OR ((((petroio OR petriuoio) OR petriiio) OR petruou) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriov OR peteriv) OR ((((petroio OR petriuoio) OR petriiio) OR petruou) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteriov OR peteriv) OR ((((petroio OR petriuoio) OR petriiio) OR petruou) OR petr)) o.s.*.