Perhaps you should try some spelling variations:
peters » petersen (Expand Search)
petrov » petro (Expand Search), petriov (Expand Search), petroov (Expand Search), perov (Expand Search)
petruov » pentruov (Expand Search), petriov (Expand Search), petriuov (Expand Search), petrouov (Expand Search), peruov (Expand Search)
petru » pentru (Expand Search), petri (Expand Search), petriu (Expand Search), petrou (Expand Search), peru (Expand Search)
petriuo » petriiuo (Expand Search), petroiuo (Expand Search), periuo (Expand Search)
petr » petri (Expand Search), petro (Expand Search), per (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 (peters OR (((petrov OR peterov) OR petruov) OR ((petru OR petriuo) OR (petr OR peter)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peters OR (((petrov OR peterov) OR petruov) OR ((petru OR petriuo) OR (petr OR peter)))) o.s.*".