Perhaps you should try some spelling variations:
peterouv » petrov (Expand Search)
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petriooiov » peteriooiov (Expand Search), petriiooiov (Expand Search), petruiooiov (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petruoui » peteruoui (Expand Search), petriuoui (Expand Search), petruuoui (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 ((peterouv OR (petriooiov OR petriiov)) OR (((petrui OR petrui) OR petruoui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterouv OR (petriooiov OR petriiov)) OR (((petrui OR petrui) OR petruoui) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterouv OR (petriooiov OR petriiov)) OR (((petrui OR petrui) OR petruoui) OR petr)) o.s.*.