Perhaps you should try some spelling variations:
"modified write optimisation algorithms" » "modified write optimization algorithms", "modified write estimation algorithms", "modified write estimation algorithm", "modified write optimization algorithmss", "modified write estimation algorithmss"
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"

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