Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petriov » petrov (Expand Search), petruiov (Expand Search), petroiov (Expand Search), periov (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (Expand Search)
petruuuio » petruuuuio (Expand Search), petrouuuio (Expand Search), peruuuio (Expand Search)
petrouuio » petruouuio (Expand Search), petroouuio (Expand Search), perouuio (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (Expand Search)

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 petriov) OR ((petri OR (petruuuio OR petrouuio)) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR petriov) OR ((petri OR (petruuuio OR petrouuio)) OR (petr OR peter))) o.s.*".