Perhaps you should try some spelling variations:
"modified objective optimization algorithm" » "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective estimation algorithm", "modified multiobjective optimization algorithm"
"modified optimal evolution algorithms" » "modified optimal evolution algorithm", "modified optimal convolution algorithms", "modified optimal solution algorithm", "modified optimal solution algorithms", "modified time evolution algorithms", "modified thermal evolution algorithms"

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