Perhaps you should try some spelling variations:
"modified objective convolution algorithms" » "modified objective evolution algorithm", "modified objective solution algorithm"
"modified aging optimisation algorithm" » "modified aging optimization algorithms", "modified aging estimation algorithm", "modified aging estimation algorithms", "modified staffing optimization algorithm", "modified caging optimisation algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective convolution algorithms") OR ("modified aging optimisation algorithm"))~.
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