Perhaps you should try some spelling variations:
"modified delphi convolution algorithms" » "modified delphi evolution algorithm", "modified delphi solution algorithm"
"modified learning emotion algorithm" » "mobile learning emotion algorithm", "modified caging emotion algorithm", "modified learning evolution algorithm", "modified learning estimation algorithm", "modified learning predation algorithm", "modified learning method algorithm"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified learning emotion algorithm") OR ("modified delphi convolution algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified learning emotion algorithm\") OR (\"modified delphi convolution algorithms\"))*".
• Removing quotes may allow a broader search: (( modified learning emotion algorithm ) OR ( modified delphi convolution algorithms ))*.