Perhaps you should try some spelling variations:
"modified objective convolution algorithms" » "modified objective evolution algorithm"
"modified time solution algorithm" » "modified time evolution algorithm", "modified time evolutionary algorithm", "modified time estimation algorithm", "modified bi1 solution algorithm", "modified male solution algorithm", "modified time solutions algorithm", "modified optimal solution algorithm"

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