Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (Expand Search)
peteruov » petrov (Expand Search)
petruoiov » peteruoiov (Expand Search), petriuoiov (Expand Search), petruuoiov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petriiuov » peteriiuov (Expand Search), petriiiuov (Expand Search), petruiiuov (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 ((peteriiov OR petruoiov) OR ((petroi OR ((petriuov OR petriiuov) OR peteruov)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriiov OR petruoiov) OR ((petroi OR ((petriuov OR petriiuov) OR peteruov)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteriiov OR petruoiov) OR ((petroi OR ((petriuov OR petriiuov) OR peteruov)) OR petr)) o.s.*.