Perhaps you should try some spelling variations:
petriov » petrov (Expand Search), petriiov (Expand Search), petruiov (Expand Search), petroiov (Expand Search), petriv (Expand Search), petrisv (Expand Search)
petr » petri (Expand Search), petru (Expand Search), petro (Expand Search)
petroiuov » petrioiuov (Expand Search), petruoiuov (Expand Search), petrooiuov (Expand Search)
petroiiov » petrioiiov (Expand Search), petruoiiov (Expand Search), petrooiiov (Expand Search)
petrio » petriio (Expand Search), petruio (Expand Search), petroio (Expand Search), petri (Expand Search), petris (Expand Search), petro (Expand Search)
petroio » petrioio (Expand Search), petruoio (Expand Search), petrooio (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 ((((petriov OR petr) OR petroiuov) OR petroiiov) OR ((petrio OR petroio) OR peter)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriov OR petr) OR petroiuov) OR petroiiov) OR ((petrio OR petroio) OR peter)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriov OR petr) OR petroiuov) OR petroiiov) OR ((petrio OR petroio) OR peter)) o.s.*.