Perhaps you should try some spelling variations:
peteruiv » peterdi (Expand Search)
petrouiv » petrov (Expand Search), peterouiv (Expand Search), petriouiv (Expand Search), petruouiv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petriuoov » peteriuoov (Expand Search), petriiuoov (Expand Search), petruiuoov (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 ((petriov OR (peteruiv OR petrouiv)) OR ((petrui OR (petriuoov OR petriuoov)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR (peteruiv OR petrouiv)) OR ((petrui OR (petriuoov OR petriuoov)) OR petr)) o.s.*".