Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), periiov (Expand Search)
petro » petrov (Expand Search), petero (Expand Search), pero (Expand Search)
petriuv » peteriuv (Expand Search), periuv (Expand Search)
petriiiov » peteriiiov (Expand Search), periiiov (Expand Search)
petri » peteri (Expand Search), peri (Expand Search)
petru » peteru (Expand Search), peru (Expand Search)
petr » peter (Expand Search), per (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 ((petriuv OR (petriiov OR petriiiov)) OR ((((petro OR pero) OR petri) OR petru) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuv OR (petriiov OR petriiiov)) OR ((((petro OR pero) OR petri) OR petru) OR petr)) o.s.*".