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

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