Perhaps you should try some spelling variations:
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petriuov » peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (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 ((petruv OR (petriuov OR petrov)) OR (((petruo OR petriu) OR perio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR (petriuov OR petrov)) OR (((petruo OR petriu) OR perio) OR petr)) o.s.*".