Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petriv » petris (Expand Search), petrov (Expand Search), petruiv (Expand Search), petroiv (Expand Search), periv (Expand Search)
pero » petro (Expand Search), per (Expand Search), pro (Expand Search)
petruiiv » petruuiiv (Expand Search), petrouiiv (Expand Search), peruiiv (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (Expand Search)
petruuui » petruuuui (Expand Search), petrouuui (Expand Search), peruuui (Expand Search)
petr » petru (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 ((peterov OR (petriv OR petruiiv)) OR ((pero OR (petri OR petruuui)) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR (petriv OR petruiiv)) OR ((pero OR (petri OR petruuui)) OR (petr OR peter))) o.s.*".