Perhaps you should try some spelling variations:
petriiuv » peteriiuv (Expand Search), petriiiuv (Expand Search), petroiiuv (Expand Search)
petriuiiuv » peteriuiiuv (Expand Search), petriiuiiuv (Expand Search), petroiuiiuv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petrouv (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petroiuo (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 ((petriiuv OR (peteriiuv OR petriuiiuv)) OR (((petru OR petruv) OR petriuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiuv OR (peteriiuv OR petriuiiuv)) OR (((petru OR petruv) OR petriuo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriiuv OR (peteriiuv OR petriuiiuv)) OR (((petru OR petruv) OR petriuo) OR petr)) o.s.*.