Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petroiuov (Expand Search)
peri » petri (Expand Search), per (Expand Search)
periiuo » petriiuo (Expand Search), periuo (Expand Search)
petrouv » peterouv (Expand Search), petriouv (Expand Search), petroouv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petroiuo » peteroiuo (Expand Search), petrioiuo (Expand Search), petrooiuo (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 ((petriuov OR petrouv) OR (((petru OR peri) OR (petroiuo OR periiuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuov OR petrouv) OR (((petru OR peri) OR (petroiuo OR periiuo)) OR petr)) o.s.*".