Perhaps you should try some spelling variations:
petroiov » petrov (Expand Search), peteroiov (Expand Search), petrioiov (Expand Search), petruoiov (Expand Search)
peterui » peterdi (Expand Search)
petruiiov » peteruiiov (Expand Search), petriuiiov (Expand Search), petruuiiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petroiv » peteroiv (Expand Search), petrioiv (Expand Search), petruoiv (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 ((((petruiiov OR (petroiov OR petruov)) OR petruiiov) OR petroiv) OR (peterui OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruiiov OR (petroiov OR petruov)) OR petruiiov) OR petroiv) OR (peterui OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruiiov OR (petroiov OR petruov)) OR petruiiov) OR petroiv) OR (peterui OR petr)) o.s.*.