Perhaps you should try some spelling variations:
peterv » peter (Expand Search), peters (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), petri (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search), petrov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search), petru (Expand Search), petrov (Expand Search)
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petruiuv (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 ((peterv OR peteri) OR (petr OR ((petriov OR (petruv OR petriuv)) OR peterv))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterv OR peteri) OR (petr OR ((petriov OR (petruv OR petriuv)) OR peterv))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterv OR peteri) OR (petr OR ((petriov OR (petruv OR petriuv)) OR peterv))) o.s.*.