Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petruo » petru (Expand Search), petro (Expand Search), petriuo (Expand Search), petruuo (Expand Search), petrouo (Expand Search)
petruuo » petriuuo (Expand Search), petruuuo (Expand Search), petrouuo (Expand Search)
petruio » petriuio (Expand Search), petruuio (Expand Search), petrouio (Expand Search)
petriuuio » petriiuuio (Expand Search), petruiuuio (Expand Search), petroiuuio (Expand Search)
petr » petri (Expand Search), petru (Expand Search), petro (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 (((petruo OR petruuo) OR (petruio OR petriuuio)) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterov OR (((petruo OR petruuo) OR (petruio OR petriuuio)) OR (petr OR peter))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (peterov OR (((petruo OR petruuo) OR (petruio OR petriuuio)) OR (petr OR peter))) o.s.*.