Perhaps you should try some spelling variations:
structural functionalism » structural functions, structured functional, structural function
"structural functional" » "structure function", "structure functions"
structure functional » structure function, structure functions

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("((structural functionalism) or (structure functional))") OR ("structural functional")).
• Removing quotes may allow a broader search: (( ((structural functionalism) or (structure functional)) ) or ( structural functional )).
• Adding a wildcard symbol may retrieve word variants: (("((structural functionalism) or (structure functional))") or ("structural functional"))*.