Perhaps you should try some spelling variations:
"Help:Pronunciation resterling key" » "Help:Pronunciation sterling key", "Help:Pronunciation restoring key", "Help:Pronunciation osterling key"
"Help:Pronunciation spelling key" » "Help:Pronunciation swelling key", "Help:Pronunciation schelling key", "Help:Pronunciation sterling key"
"Help:Pronunciation selling key" » "Help:Pronunciation kelling key", "Help:Pronunciation schelling key", "Help:Pronunciation sterling key"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Help:Pronunciation resterling key") OR ((("Help:Pronunciation spelling key") OR ("Help:Pronunciation selling key"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Help:Pronunciation resterling key\") OR (((\"Help:Pronunciation spelling key\") OR (\"Help:Pronunciation selling key\"))))".
• Removing quotes may allow a broader search: (( Help:Pronunciation resterling key ) OR ((( Help:Pronunciation spelling key ) OR ( Help:Pronunciation selling key )))).
• Adding a wildcard symbol may retrieve word variants: (("Help:Pronunciation resterling key") OR ((("Help:Pronunciation spelling key") OR ("Help:Pronunciation selling key"))))*.