Perhaps you should try some spelling variations:
peterouv » petrov (Expand Search)
petroiiv » petrov (Expand Search), peteroiiv (Expand Search), petrioiiv (Expand Search), petrooiiv (Expand Search)
petriuuv » peteriuuv (Expand Search), petriiuuv (Expand Search), petroiuuv (Expand Search)
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petroiiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (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 ((((peterouv OR petriuuv) OR peterov) OR (petriiv OR petroiiv)) OR (petru OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((peterouv OR petriuuv) OR peterov) OR (petriiv OR petroiiv)) OR (petru OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((peterouv OR petriuuv) OR peterov) OR (petriiv OR petroiiv)) OR (petru OR petr)) o.s.*.