Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
peteruov » petrov (Expand Search)
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petruiuv (Expand Search)
petrouv » peterouv (Expand Search), petriouv (Expand Search), petruouv (Expand Search)
petriou » peteriou (Expand Search), petriiou (Expand Search), petruiou (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 ((((petriiov OR peteruov) OR peterov) OR (petriuv OR petrouv)) OR (petriou OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriiov OR peteruov) OR peterov) OR (petriuv OR petrouv)) OR (petriou OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriiov OR peteruov) OR peterov) OR (petriuv OR petrouv)) OR (petriou OR petr)) o.s.*.