Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petroiiov (Expand Search)
petroiiuov » peteroiiuov (Expand Search), petrioiiuov (Expand Search), petrooiiuov (Expand Search)
petriuiov » peteriuiov (Expand Search), petriiuiov (Expand Search), petroiuiov (Expand Search)
petrouv » peterouv (Expand Search), petriouv (Expand Search), petroouv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (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 ((petroiiuov OR (petriiov OR ((petriuiov OR petrouv) OR peteruiov))) OR (petru OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petroiiuov OR (petriiov OR ((petriuiov OR petrouv) OR peteruiov))) OR (petru OR petr)) o.s.*".