Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petroov » petrov (Expand Search), petruoov (Expand Search), petrooov (Expand Search), peroov (Expand Search)
petrow » petro (Expand Search), petrov (Expand Search), petrowna (Expand Search), petruow (Expand Search), petroow (Expand Search), perow (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (Expand Search)
peteru » petru (Expand Search), peters (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 ((((peterov OR petroov) OR (petrow OR petri)) o) OR ((petr OR (peteru OR peter)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((peterov OR petroov) OR (petrow OR petri)) o) OR ((petr OR (peteru OR peter)) _)). s.*".