Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
peri » per (Expand Search)
petruuv » peteruuv (Expand Search), petrouuv (Expand Search), peruuv (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petrui » peterui (Expand Search), petroui (Expand Search), perui (Expand Search)
petriov » peteriov (Expand Search), petroiov (Expand Search), periov (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (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 (petruuv OR ((((petru OR petrui) OR (petriov OR peteriov)) OR (peri OR petri)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petruuv OR ((((petru OR petrui) OR (petriov OR peteriov)) OR (peri OR petri)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petruuv OR ((((petru OR petrui) OR (petriov OR peteriov)) OR (peri OR petri)) OR petr)) o.s.*.