Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"modified df solution algorithmss" » "modified df solution algorithm", "modified df evolution algorithm", "modified df convolution algorithms", "modified _ solution algorithmss", "modified adam solution algorithmss", "modified bi1 solution algorithmss", "modified drug solution algorithmss", "modified up solutions algorithmss"

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