Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petriiv » petriiiv (Expand Search), petruiiv (Expand Search), petroiiv (Expand Search)
petriiuiu » petriiiuiu (Expand Search), petruiiuiu (Expand Search), petroiiuiu (Expand Search)
petrioiuo » petriioiuo (Expand Search), petruioiuo (Expand Search), petroioiuo (Expand Search)
petruioiuo » petriuioiuo (Expand Search), petruuioiuo (Expand Search), petrouioiuo (Expand Search)
petr » petri (Expand Search), petru (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 ((peterov OR petriiv) OR ((petriiuiu OR (petrioiuo OR petruioiuo)) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR petriiv) OR ((petriiuiu OR (petrioiuo OR petruioiuo)) OR (petr OR peter))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterov OR petriiv) OR ((petriiuiu OR (petrioiuo OR petruioiuo)) OR (petr OR peter))) o.s.*.