Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petru (Expand Search), petero (Expand Search), petrio (Expand Search), petruo (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petriiuv » peteriiuv (Expand Search), petriiiuv (Expand Search), petruiiuv (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 petriv) OR peteriov) OR (peteruv OR petriiuv)) OR (petro OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruov OR petriv) OR peteriov) OR (peteruv OR petriiuv)) OR (petro OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruov OR petriv) OR peteriov) OR (peteruv OR petriiuv)) OR (petro OR petr)) o.s.*.