Perhaps you should try some spelling variations:
"modified parameter optimisation algorithm" » "modified parameter optimization algorithms", "modified parameter estimation algorithm", "modified parameter optimization algorithm"
"modified charging estimation algorithms" » "modified charging estimation algorithm", "modified charging optimization algorithms", "modified charging approximation algorithms", "modified charging station algorithms", "modified caging estimation algorithms", "modified carbon estimation algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified charging estimation algorithms") or ("modified parameter optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified charging estimation algorithms") OR ("modified parameter optimisation algorithm")).
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