Perhaps you should try some spelling variations:
"spanish literature african influences." » "spanish literatura africana influences.", "spanish literature mexican influences.", "spanish literatura americana influences.", "spanish literature american influences.", "spanish literature german influences.", "spanish literature arab influences."
"spanish literature mexico influence." » "spanish literatura mexico influence.", "spanish literatura mexicana influence.", "spanish literature america influence.", "spanish literature media influence.", "spanish literature music influence."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("spanish literature african influences.") or ("spanish literature mexico influence."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("spanish literature african influences.") OR ("spanish literature mexico influence.")).
• Removing quotes may allow a broader search: (( spanish literature african influences. ) or ( spanish literature mexico influence. )).
• Adding a wildcard symbol may retrieve word variants: (("spanish literature african influences.") or ("spanish literature mexico influence."))*.