Perhaps you should try some spelling variations:
petroiov » petrov (Expand Search), peteroiov (Expand Search), petrioiov (Expand Search), petrooiov (Expand Search)
peru » per (Expand Search)
peri » petri (Expand Search), per (Expand Search)
peterui » peterdi (Expand Search)
petroiui » petrovici (Expand Search), peteroiui (Expand Search), petrioiui (Expand Search), petrooiui (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petr » peter (Expand Search), petri (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 ((petroiov OR petroiov) OR (((petru OR peru) OR (peri OR (peterui OR petroiui))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petroiov OR petroiov) OR (((petru OR peru) OR (peri OR (peterui OR petroiui))) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petroiov OR petroiov) OR (((petru OR peru) OR (peri OR (peterui OR petroiui))) OR petr)) o.s.*.