Perhaps you should try some spelling variations:
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petruiiv (Expand Search)
petriiiuv » peteriiiuv (Expand Search), petriiiiuv (Expand Search), petruiiiuv (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petriuiio » peteriuiio (Expand Search), petriiuiio (Expand Search), petruiuiio (Expand Search)
petruiuiio » peteruiuiio (Expand Search), petriuiuiio (Expand Search), petruuiuiio (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 ((petriiv OR petriiiuv) OR (((petrov OR (petriuiio OR petruiuiio)) OR petero) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiv OR petriiiuv) OR (((petrov OR (petriuiio OR petruiuiio)) OR petero) OR petr)) o.s.*".