Perhaps you should try some spelling variations:
petroiov » petrov (Expand Search), peteroiov (Expand Search), petrioiov (Expand Search), petruoiov (Expand Search)
petrioiv » petrov (Expand Search), peterioiv (Expand Search), petriioiv (Expand Search), petruioiv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrooiiov » peterooiiov (Expand Search), petriooiiov (Expand Search), petruooiiov (Expand Search)
petroooiiov » peteroooiiov (Expand Search), petrioooiiov (Expand Search), petruoooiiov (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 petroiov) OR (petrooiiov OR petroooiiov)) OR petrioiv) OR (peteri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriov OR petroiov) OR (petrooiiov OR petroooiiov)) OR petrioiv) OR (peteri OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriov OR petroiov) OR (petrooiiov OR petroooiiov)) OR petrioiv) OR (peteri OR petr)) o.s.*.