Perhaps you should try some spelling variations:
petriuv » petriiuv (Expand Search), petruiuv (Expand Search), petroiuv (Expand Search)
petriuuv » petriiuuv (Expand Search), petruiuuv (Expand Search), petroiuuv (Expand Search)
petroou » petrioou (Expand Search), petruoou (Expand Search), petrooou (Expand Search)
petriou » petriiou (Expand Search), petruiou (Expand Search), petroiou (Expand Search)
petrooiou » petriooiou (Expand Search), petruooiou (Expand Search), petroooiou (Expand Search)
petr » petri (Expand Search), petru (Expand Search), petro (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 petriuuv) OR ((petroou OR (petriou OR petrooiou)) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuv OR petriuuv) OR ((petroou OR (petriou OR petrooiou)) OR (petr OR peter))) o.s.*".