Perhaps you should try some spelling variations:
petrouiv » petrov (Expand Search), peterouiv (Expand Search), petriouiv (Expand Search), petruouiv (Expand Search)
petriuuiv » peteriuuiv (Expand Search), petriiuuiv (Expand Search), petruiuuiv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (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 ((petriuuiv OR (petrouiv OR (peterov OR petriov))) OR ((petrui OR petrio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuuiv OR (petrouiv OR (peterov OR petriov))) OR ((petrui OR petrio) OR petr)) o.s.*".