Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petroiiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petrouov (Expand Search)
petroiuov » peteroiuov (Expand Search), petrioiuov (Expand Search), petrooiuov (Expand Search)
petroov » peteroov (Expand Search), petrioov (Expand Search), petrooov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petroiuv (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 (((petruov OR petroiuov) OR petriiov) OR (((petroov OR petru) OR petriuv) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruov OR petroiuov) OR petriiov) OR (((petroov OR petru) OR petriuv) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruov OR petroiuov) OR petriiov) OR (((petroov OR petru) OR petriuv) OR petr)) o.s.*.