Talvez debería tentar con algunhas variantes ortográficas:
communities interaction » communities interactions, community interaction, communities extraction
databases optimizing » catalysis optimizing, analysis optimizing, databases mining
https directional » wimps directional, aids directional, two directional
databases induced » databases bncod, diseases induced

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• Performing a fuzzy search may retrieve terms with similar spellings: communities interaction https directional ((databases optimizing) or (databases induced))~.
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