Perhaps you should try some spelling variations:
"support face interactions theories." » "support face interaction terms.", "support face interaction theories.", "support market interactions theories.", "support _ interactions theories.", "support falls interactions theories.", "support price interactions theories.", "support since interactions theories."
"support fare integration theories." » "support fare integration theory.", "support fare integration through.", "support fare integration efforts.", "support market integration theories.", "support trade integration theories.", "support data integration theories.", "support falls integration theories.", "support state integration theories."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("support face interactions theories.") or ("support fare integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support face interactions theories.") OR ("support fare integration theories.")).
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