Perhaps you should try some spelling variations:
petruoiv » petrov (Expand Search), peteruoiv (Expand Search), petriuoiv (Expand Search), petruuoiv (Expand Search)
petruuuov » peteruuuov (Expand Search), petriuuuov (Expand Search), petruuuuov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruio » peteruio (Expand Search), petriuio (Expand Search), petruuio (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 (((petruoiv OR petruuuov) OR (petruv OR peteruv)) OR ((petroi OR petruio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruoiv OR petruuuov) OR (petruv OR peteruv)) OR ((petroi OR petruio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruoiv OR petruuuov) OR (petruv OR peteruv)) OR ((petroi OR petruio) OR petr)) o.s.*.