Perhaps you should try some spelling variations:
petroiuv » petrov (Expand Search), peteroiuv (Expand Search), petrioiuv (Expand Search), petrooiuv (Expand Search)
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petroiiv (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petrouov (Expand Search)
petriiuov » peteriiuov (Expand Search), petriiiuov (Expand Search), petroiiuov (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 (((petriiv OR petroiuv) OR (petruov OR (petriiuov OR peteruiuov))) OR (petru OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriiv OR petroiuv) OR (petruov OR (petriiuov OR peteruiuov))) OR (petru OR petr)) o.s.*".