Perhaps you should try some spelling variations:
petrov » petro (Expand Search), peterov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petriuov » peteriuov (Expand Search), petruiuov (Expand Search), petroiuov (Expand Search)
petruuiuov » peteruuiuov (Expand Search), petruuuiuov (Expand Search), petrouuiuov (Expand Search)
petroio » peteroio (Expand Search), petruoio (Expand Search), petrooio (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 ((((petriuov OR petruuiuov) OR peteroiuov) OR petrov) OR (petroio OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriuov OR petruuiuov) OR peteroiuov) OR petrov) OR (petroio OR (petr OR petri))) o.s.*".