Perhaps you should try some spelling variations:
peterouv » petrov (Expand Search)
petriiov » petrov (Expand Search), peteriiov (Expand Search), petruiiov (Expand Search), petroiiov (Expand Search)
petruuv » peteruuv (Expand Search), petruuuv (Expand Search), petrouuv (Expand Search)
petruoiov » peteruoiov (Expand Search), petruuoiov (Expand Search), petrouoiov (Expand Search)
petruo » peteruo (Expand Search), petruuo (Expand Search), petrouo (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 (((peterouv OR petruuv) OR (petruoiov OR petriiov)) OR ((petruo OR petri) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peterouv OR petruuv) OR (petruoiov OR petriiov)) OR ((petruo OR petri) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((peterouv OR petruuv) OR (petruoiov OR petriiov)) OR ((petruo OR petri) OR petr)) o.s.*.