Perhaps you should try some spelling variations:
petruuov » petrov (Expand Search), peteruuov (Expand Search), petriuuov (Expand Search), petruuuov (Expand Search)
peterui » peterdi (Expand Search)
petrouuuv » peterouuuv (Expand Search), petriouuuv (Expand Search), petruouuuv (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petriuui » peteriuui (Expand Search), petriiuui (Expand Search), petruiuui (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 ((petruuov OR (peteruv OR petrouuuv)) OR (((petrui OR peterui) OR petriuui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuov OR (peteruv OR petrouuuv)) OR (((petrui OR peterui) OR petriuui) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruuov OR (peteruv OR petrouuuv)) OR (((petrui OR peterui) OR petriuui) OR petr)) o.s.*.