Perhaps you should try some spelling variations:
pero » per (Expand Search), pro (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petero (Expand Search), petrio (Expand Search), pero (Expand Search)
petruoa » peteruoa (Expand Search), petriuoa (Expand Search), peruoa (Expand Search), pentruoa (Expand Search), petrioa (Expand Search)
petr » peter (Expand Search), petri (Expand Search), per (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), peru (Expand Search), pentru (Expand Search), petri (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), petri (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 ((((petruoa OR (pero OR petro)) OR (pero OR petro)) o) OR ((petr OR (peteri OR petru)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruoa OR (pero OR petro)) OR (pero OR petro)) o) OR ((petr OR (peteri OR petru)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruoa OR (pero OR petro)) OR (pero OR petro)) o) OR ((petr OR (peteri OR petru)) _)). s.*.