Perhaps you should try some spelling variations:
petriovw » petrov (Expand Search), petrow (Expand Search), peteriovw (Expand Search), petriiovw (Expand Search), petruiovw (Expand Search)
peterovw » petrov (Expand Search), petrow (Expand Search)
petriuw » peteriuw (Expand Search), petriiuw (Expand Search), petruiuw (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petro » petero (Expand Search), petrio (Expand Search), petruo (Expand Search), petrov (Expand Search), petri (Expand Search), petru (Expand Search)
petriui » peteriui (Expand Search), petriiui (Expand Search), petruiui (Expand Search)
peteriui » peterdi (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((((petriuw OR (petriovw OR peterovw)) OR petr) o) OR ((petro OR (petriui OR peteriui)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriuw OR (petriovw OR peterovw)) OR petr) o) OR ((petro OR (petriui OR peteriui)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriuw OR (petriovw OR peterovw)) OR petr) o) OR ((petro OR (petriui OR peteriui)) _)). s.*.