Perhaps you should try some spelling variations:
peteriiv » peterdi (Expand Search)
petrouiiv » peterouiiv (Expand Search), petriouiiv (Expand Search), petruouiiv (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((peteriiv OR petrouiiv) OR ((petriu OR (petriov OR petrov)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriiv OR petrouiiv) OR ((petriu OR (petriov OR petrov)) OR petr)) o.s.*".