Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petroiuov (Expand Search)
petruuov » petrov (Expand Search), peteruuov (Expand Search), petriuuov (Expand Search), petrouuov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petrouv (Expand Search)
petruuv » peteruuv (Expand Search), petriuuv (Expand Search), petrouuv (Expand Search)
petriuuuuv » peteriuuuuv (Expand Search), petriiuuuuv (Expand Search), petroiuuuuv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 ((((petruv OR petruuv) OR petriuuuuv) OR (petriuov OR petruuov)) OR (petru OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruv OR petruuv) OR petriuuuuv) OR (petriuov OR petruuov)) OR (petru OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruv OR petruuv) OR petriuuuuv) OR (petriuov OR petruuov)) OR (petru OR petr)) o.s.*.