Perhaps you should try some spelling variations:
petruov » petrov (Expand Search), petriuov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petr » petri (Expand Search), petru (Expand Search), petro (Expand Search)
petrisiuov » petriisiuov (Expand Search), petruisiuov (Expand Search), petroisiuov (Expand Search), petriiuov (Expand Search)
petruuiiov » petriuuiiov (Expand Search), petruuuiiov (Expand Search), petrouuiiov (Expand Search)
petris » petriis (Expand Search), petruis (Expand Search), petrois (Expand Search), petri (Expand Search)
petruio » petriuio (Expand Search), petruuio (Expand Search), petrouio (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 petr) OR petrisiuov) OR petruuiiov) OR ((petris OR petruio) OR peter)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruov OR petr) OR petrisiuov) OR petruuiiov) OR ((petris OR petruio) OR peter)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruov OR petr) OR petrisiuov) OR petruuiiov) OR ((petris OR petruio) OR peter)) o.s.*.