Perhaps you should try some spelling variations:
"modified discursive convolution algorithms" » "modified discursive construction algorithms", "modified discursive evolution algorithm", "modified discursive solution algorithm"
"modified objective allocation algorithms" » "modified objective estimation algorithms", "modified objective approximation algorithms"

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