Perhaps you should try some spelling variations:
petrov » petro (Expand Search), peterov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petruiiv » peteruiiv (Expand Search), petruuiiv (Expand Search), petrouiiv (Expand Search)
petriuuuov » peteriuuuov (Expand Search), petruiuuuov (Expand Search), petroiuuuov (Expand Search)
petriiiov » peteriiiov (Expand Search), petruiiiov (Expand Search), petroiiiov (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 (((petruiiv OR (petrov OR petriuuuov)) OR petruiiv) OR (petriiiov OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruiiv OR (petrov OR petriuuuov)) OR petruiiv) OR (petriiiov OR (petr OR petri))) o.s.*".