Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petriiuov » peteriiuov (Expand Search), petriiiuov (Expand Search), petruiiuov (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petruoiu (Expand Search)
petruiuv » peteruiuv (Expand Search), petriuiuv (Expand Search), petruuiuv (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 ((petriiuov OR petriiov) OR (((petriu OR petroiu) OR (peteriuv OR petruiuv)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiuov OR petriiov) OR (((petriu OR petroiu) OR (peteriuv OR petruiuv)) OR petr)) o.s.*".