Perhaps you should try some spelling variations:
petriov » petrov (Expand Search), petriv (Expand Search), petrisv (Expand Search)
petruv » petru (Expand Search), petrov (Expand Search)
peteri » peterdi (Expand Search), petri (Expand Search), peters (Expand Search)
peteriiuo » peterdiiuo (Expand Search), petriiuo (Expand Search), petersiuo (Expand Search)
petrio » petri (Expand Search), petris (Expand Search), petro (Expand Search)
peteru » petru (Expand Search), peters (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 ((petriov OR petruv) OR ((((peteri OR petrio) OR peteru) OR peteriiuo) OR peter)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR petruv) OR ((((peteri OR petrio) OR peteru) OR peteriiuo) OR peter)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriov OR petruv) OR ((((peteri OR petrio) OR peteru) OR peteriiuo) OR peter)) o.s.*.