Perhaps you should try some spelling variations:
petrouv » peterouv (Expand Search), petruouv (Expand Search), petroouv (Expand Search)
petruoouv » peteruoouv (Expand Search), petruuoouv (Expand Search), petrouoouv (Expand Search)
petrov » peterov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petrouuo » peterouuo (Expand Search), petruouuo (Expand Search), petroouuo (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 ((petrouv OR (petruoouv OR petrov)) OR ((petri OR (peteruo OR petrouuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrouv OR (petruoouv OR petrov)) OR ((petri OR (peteruo OR petrouuo)) OR petr)) o.s.*".