Perhaps you should try some spelling variations:
peteriiv » peterdi (Expand Search)
petriouv » petrov (Expand Search), peteriouv (Expand Search), petriiouv (Expand Search), petruiouv (Expand Search)
petrv » peterv (Expand Search), petriv (Expand Search), petruv (Expand Search)
petrouv » peterouv (Expand Search), petriouv (Expand Search), petruouv (Expand Search)
petriui » peteriui (Expand Search), petriiui (Expand Search), petruiui (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 ((peteriiv OR (petrv OR (petrouv OR petriouv))) OR ((pero OR petriui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriiv OR (petrv OR (petrouv OR petriouv))) OR ((pero OR petriui) OR petr)) o.s.*".