Potser podríeu intentar variants ortogràfiques:
communication foundation » communication education, communication communication, communication information
foundation center » foundation letter, foundation chapter, foundation water
euclidean graphs » euclidean spaces, euclidean group, euclidean rings
euclidean gibbs » euclidean rings, euclidean logics
center genetic » cancer genetic, century genetics, cancer genetics

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• Executant una cerca difusa por obtener resultaste amo pararles similares: communication foundation center genetic ((euclidean gibbs) OR (euclidean graphs))~.
• Les paraules AND, OR i NOT poden confondre la cerca; provi d'afegir cometes: "communication foundation center genetic ((euclidean gibbs) OR (euclidean graphs))".
• Afegint truncament pot recuperar més registres: communication foundation center genetic ((euclidean gibbs) OR (euclidean graphs))*.