Perhaps you should try some spelling variations:
"modified notion optimization algorithms" » "modified notion optimisation algorithm", "modified notion estimation algorithms", "modified notion estimation algorithm", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"modified chemical convolution algorithms" » "modified chemical evolution algorithm", "modified chemical solution algorithm", "modified chemical solution algorithms", "modified chemical compositions algorithms", "modified thermal convolution algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified chemical convolution algorithms") or ("modified notion optimization algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified chemical convolution algorithms") OR ("modified notion optimization algorithms")).
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