Perhaps you should try some spelling variations:
peteriiv » peterdi (Expand Search)
petruouv » petrov (Expand Search), peteruouv (Expand Search), petriuouv (Expand Search), petruuouv (Expand Search)
petrv » peterv (Expand Search), petriv (Expand Search), petruv (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petriiui » peteriiui (Expand Search), petriiiui (Expand Search), petruiiui (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((peteriiv OR (petrv OR petruouv)) OR ((pero OR (petrui OR petriiui)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriiv OR (petrv OR petruouv)) OR ((pero OR (petrui OR petriiui)) OR petr)) o.s.*".