Perhaps you should try some spelling variations:
petrov » petro (Expand Search), petruov (Expand Search), petroov (Expand Search), perov (Expand Search)
peteru » petru (Expand Search), peters (Expand Search)
petero » peters (Expand Search), petro (Expand Search)
petriiov » petruiiov (Expand Search), petroiiov (Expand Search), periiov (Expand Search)
petriuo » petruiuo (Expand Search), petroiuo (Expand Search), periuo (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (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 ((petriiov OR petrov) OR ((peteru OR ((petero OR peter) OR petriuo)) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiov OR petrov) OR ((peteru OR ((petero OR peter) OR petriuo)) OR (petr OR petri))) o.s.*".