Perhaps you should try some spelling variations:
petruv » petru (Expand Search), petrov (Expand Search), peteruv (Expand Search), petruuv (Expand Search), petrouv (Expand Search)
petrio » petris (Expand Search), petro (Expand Search), peterio (Expand Search), petruio (Expand Search), petroio (Expand Search)
petriuv » peteriuv (Expand Search), petruiuv (Expand Search), petroiuv (Expand Search)
petruio » peteruio (Expand Search), petruuio (Expand Search), petrouio (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 ((petruv OR petriuv) OR ((petrio OR petruio) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR petriuv) OR ((petrio OR petruio) OR (petr OR petri))) o.s.*".