Perhaps you should try some spelling variations:
petrioiv » petrov (Expand Search), peterioiv (Expand Search), petriioiv (Expand Search), petroioiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petroiu (Expand Search)
petriui » peteriui (Expand Search), petriiui (Expand Search), petroiui (Expand Search)
petruui » peteruui (Expand Search), petriuui (Expand Search), petrouui (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 (petrioiv OR ((((petru OR petriu) OR (petriui OR petruui)) OR peteri) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petrioiv OR ((((petru OR petriu) OR (petriui OR petruui)) OR peteri) OR petr)) o.s.*".