Perhaps you should try some spelling variations:
peteruov » petrov (Expand Search)
peteriov » petrov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriuuv » peteriuuv (Expand Search), petriiuuv (Expand Search), petruiuuv (Expand Search)
petruiuuv » peteruiuuv (Expand Search), petriuiuuv (Expand Search), petruuiuuv (Expand Search)
petruiuv » peteruiuv (Expand Search), petriuiuv (Expand Search), petruuiuv (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 peteruov) OR peteriov) OR ((petriuuv OR petruiuuv) OR petruiuv)) OR petr) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruov OR peteruov) OR peteriov) OR ((petriuuv OR petruiuuv) OR petruiuv)) OR petr) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruov OR peteruov) OR peteriov) OR ((petriuuv OR petruiuuv) OR petruiuv)) OR petr) o.s.*.