Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petruuiv » pentruuiv (Expand Search), peteruuiv (Expand Search), petrouuiv (Expand Search), peruuiv (Expand Search)
petroiv » petrov (Expand Search), peteroiv (Expand Search), petrooiv (Expand Search), peroiv (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petrio » peterio (Expand Search), petroio (Expand Search), perio (Expand Search), petris (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (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 (petru OR (petruuiv OR petroiv))) OR ((petr OR petrio) OR petri)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR (petru OR (petruuiv OR petroiv))) OR ((petr OR petrio) OR petri)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterov OR (petru OR (petruuiv OR petroiv))) OR ((petr OR petrio) OR petri)) o.s.*.