Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruiio » peteruiio (Expand Search), petriuiio (Expand Search), petruuiio (Expand Search)
petriuio » peteriuio (Expand Search), petriiuio (Expand Search), petruiuio (Expand Search)
petruiuio » peteruiuio (Expand Search), petriuiuio (Expand Search), petruuiuio (Expand Search)
petruuiuio » peteruuiuio (Expand Search), petriuuiuio (Expand Search), petruuuiuio (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 petriov) OR ((petruiio OR (petriuio OR (petruiuio OR petruuiuio))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuov OR petriov) OR ((petruiio OR (petriuio OR (petruiuio OR petruuiuio))) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriuov OR petriov) OR ((petruiio OR (petriuio OR (petruiuio OR petruuiuio))) OR petr)) o.s.*.