Perhaps you should try some spelling variations:
petruiov » petrov (Expand Search), peteruiov (Expand Search), petriuiov (Expand Search), petruuiov (Expand Search)
peteroov » petrov (Expand Search)
petruoov » petrov (Expand Search), peteruoov (Expand Search), petriuoov (Expand Search), petruuoov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petrouiov » peterouiov (Expand Search), petriouiov (Expand Search), petruouiov (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((petruov OR (petruiov OR petrouiov)) OR (((peteroov OR petruoov) OR peteri) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR (petruiov OR petrouiov)) OR (((peteroov OR petruoov) OR peteri) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruov OR (petruiov OR petrouiov)) OR (((peteroov OR petruoov) OR peteri) OR petr)) o.s.*.