Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petriiiov » peteriiiov (Expand Search), petriiiiov (Expand Search), petruiiiov (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petriuui » peteriuui (Expand Search), petriiuui (Expand Search), petruiuui (Expand Search)
petrioui » peterioui (Expand Search), petriioui (Expand Search), petruioui (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 ((peteruv OR (peteriov OR petriiiov)) OR (((petrui OR petriuui) OR petrioui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteruv OR (peteriov OR petriiiov)) OR (((petrui OR petriuui) OR petrioui) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteruv OR (peteriov OR petriiiov)) OR (((petrui OR petriuui) OR petrioui) OR petr)) o.s.*.