Potser podríeu intentar variants ortogràfiques:
irrigation environments » irrigation environmental, integration environments, aviation environments
programming evaluation » programming evolution, programming evaluating, programme evaluation
programming evacuation » programming evolution, programming education, programming evaluating
concepts practical » concepts practices, concepts practice, concepts analytical

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• Si vols fer servir operadors booleans, han d'estar en majúscules: irrigation environments ((programming evaluation) OR (programming evacuation)) concepts practical~.
• Afegint truncament pot recuperar més registres: irrigation environments ((programming evaluation) or (programming evacuation)) concepts practical*.