Perhaps you should try some spelling variations:
peterov » petrov (Expand Search), peterv (Expand Search), petersv (Expand Search)
petero » peter (Expand Search), peters (Expand Search), petro (Expand Search)
petriuv » peteriuv (Expand Search), petruiuv (Expand Search), petroiuv (Expand Search)
petruuiiov » peteruuiiov (Expand Search), petruuuiiov (Expand Search), petrouuiiov (Expand Search)
petruiuo » peteruiuo (Expand Search), petruuiuo (Expand Search), petrouiuo (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 petriuv) OR petruuiiov) OR ((petero OR petruiuo) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peterov OR petriuv) OR petruuiiov) OR ((petero OR petruiuo) OR (petr OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((peterov OR petriuv) OR petruuiiov) OR ((petero OR petruiuo) OR (petr OR petri))) o.s.*.