Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriui » peteriui (Expand Search), petriiui (Expand Search), petruiui (Expand Search)
petriiiui » peteriiiui (Expand Search), petriiiiui (Expand Search), petruiiiui (Expand Search)
petruiiui » peteruiiui (Expand Search), petriuiiui (Expand Search), petruuiiui (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 ((petruov OR petriuov) OR (((petriui OR (petriiiui OR petruiiui)) OR peteriuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR petriuov) OR (((petriui OR (petriiiui OR petruiiui)) OR peteriuo) OR petr)) o.s.*".