Perhaps you should try some spelling variations:
"modified parameters optimisation algorithm" » "modified parameter optimization algorithm", "modified parameter estimation algorithm", "modified parameters optimization algorithms", "modified parameters estimation algorithm", "modified parameters estimation algorithms"
"modified location optimized algorithm" » "modified location optimized algorithms", "modified location optimizer algorithms", "modified carbon optimized algorithm"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified parameters optimisation algorithm\") OR (\"modified location optimized algorithm\"))~".
• Removing quotes may allow a broader search: (( modified parameters optimisation algorithm ) OR ( modified location optimized algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified parameters optimisation algorithm") OR ("modified location optimized algorithm"))*.