Perhaps you should try some spelling variations:
"cognitive behavioral therapy for insomnia" » "cognitive behavior therapy for insomnia", "cognitive behavioral therapy for insomnio", "cognitive behavioral therapy for insignia", "cognitive behavioral therapy for somnia"
"cognitive behavioral therapy for insomne" » "cognitive behavior therapy for insomne"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("cognitive behavioral therapy for insomnia") OR ("cognitive behavioral therapy for insomne"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"cognitive behavioral therapy for insomnia\") OR (\"cognitive behavioral therapy for insomne\"))".
• Removing quotes may allow a broader search: (( cognitive behavioral therapy for insomnia ) OR ( cognitive behavioral therapy for insomne )).
• Adding a wildcard symbol may retrieve word variants: (("cognitive behavioral therapy for insomnia") OR ("cognitive behavioral therapy for insomne"))*.