Perhaps you should try some spelling variations:
petriov » petrov (Expand Search), peteriov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petruo » petru (Expand Search), petro (Expand Search), peteruo (Expand Search), petruuo (Expand Search), petrouo (Expand Search)
petruuoiuuo » peteruuoiuuo (Expand Search), petruuuoiuuo (Expand Search), petrouuoiuuo (Expand Search)
petruiuuo » peteruiuuo (Expand Search), petruuiuuo (Expand Search), petrouiuuo (Expand Search)
petroouiuuo » peteroouiuuo (Expand Search), petruoouiuuo (Expand Search), petrooouiuuo (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 (petriov OR ((petruo OR (petruuoiuuo OR (petruiuuo OR petroouiuuo))) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((petruo OR (petruuoiuuo OR (petruiuuo OR petroouiuuo))) OR (petr OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriov OR ((petruo OR (petruuoiuuo OR (petruiuuo OR petroouiuuo))) OR (petr OR petri))) o.s.*.