Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petruiuio » peteruiuio (Expand Search), petriuiuio (Expand Search), petruuiuio (Expand Search)
petruuiuuio » peteruuiuuio (Expand Search), petriuuiuuio (Expand Search), petruuuiuuio (Expand Search)
petruuuiuuio » peteruuuiuuio (Expand Search), petriuuuiuuio (Expand Search), petruuuuiuuio (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 (petriov OR ((petriuo OR (petruiuio OR (petruuiuuio OR petruuuiuuio))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((petriuo OR (petruiuio OR (petruuiuuio OR petruuuiuuio))) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriov OR ((petriuo OR (petruiuio OR (petruuiuuio OR petruuuiuuio))) OR petr)) o.s.*.