Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriuuov » peteriuuov (Expand Search), petriiuuov (Expand Search), petruiuuov (Expand Search)
petruiuuov » peteruiuuov (Expand Search), petriuiuuov (Expand Search), petruuiuuov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petroou » peteroou (Expand Search), petrioou (Expand Search), petruoou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((petruov OR ((petriuuov OR petruiuuov) OR petriov)) OR ((petroou OR peteroi) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR ((petriuuov OR petruiuuov) OR petriov)) OR ((petroou OR peteroi) OR petr)) o.s.*".