Perhaps you should try some spelling variations:
peteroiv » petrov (Expand Search), peterdi (Expand Search)
peterui » peterdi (Expand Search)
petriuuiv » peteriuuiv (Expand Search), petriiuuiv (Expand Search), petruiuuiv (Expand Search)
petruuuiv » peteruuuiv (Expand Search), petriuuuiv (Expand Search), petruuuuiv (Expand Search)
petruoui » peteruoui (Expand Search), petriuoui (Expand Search), petruuoui (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 ((peteroiv OR (petriuuiv OR petruuuiv)) OR ((peterui OR petruoui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteroiv OR (petriuuiv OR petruuuiv)) OR ((peterui OR petruoui) OR petr)) o.s.*".