Perhaps you should try some spelling variations:
"modified multiobjective optimisation algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithm", "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective estimation algorithms"
"machines using qspr algorithm" » "machinery using qspr algorithm", "machines using mppt algorithm", "machines using our algorithm", "machines using qtspim algorithm"

Try widening your search to All Fields.

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