Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petruiiuv » peteruiiuv (Expand Search), petriuiiuv (Expand Search), petruuiiuv (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (Expand Search)
petriiiio » peteriiiio (Expand Search), petriiiiio (Expand Search), petruiiiio (Expand Search)
petriiuo » peteriiuo (Expand Search), petriiiuo (Expand Search), petruiiuo (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 ((petriuov OR (petruv OR petruiiuv)) OR (((petriio OR petriiiio) OR petriiuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuov OR (petruv OR petruiiuv)) OR (((petriio OR petriiiio) OR petriiuo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriuov OR (petruv OR petruiiuv)) OR (((petriio OR petriiiio) OR petriiuo) OR petr)) o.s.*.