Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petroiiov (Expand Search)
petruiov » petrov (Expand Search), peteruiov (Expand Search), petriuiov (Expand Search), petrouiov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petrouv (Expand Search)
petrouuiov » peterouuiov (Expand Search), petriouuiov (Expand Search), petroouuiov (Expand Search)
petruiv » peteruiv (Expand Search), petriuiv (Expand Search), petrouiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 (((petruv OR (petriiov OR (petruiov OR petrouuiov))) OR petruiv) OR (petru OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruv OR (petriiov OR (petruiov OR petrouuiov))) OR petruiv) OR (petru OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruv OR (petriiov OR (petruiov OR petrouuiov))) OR petruiv) OR (petru OR petr)) o.s.*.