Perhaps you should try some spelling variations:
"data code algorithm" » "data cosine algorithm" (Expand Search), "data rd algorithm" (Expand Search), "data colony algorithm" (Expand Search)
"element mean algorithm" » "element deer algorithm" (Expand Search), "element search algorithm" (Expand Search), "elements mean algorithm" (Expand Search)
"data packing algorithm" » "data lacking algorithm" (Expand Search), "data parking algorithm" (Expand Search), "data tracking algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("data code algorithm") OR ("data packing algorithm"))) OR ("element mean algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"data code algorithm\") OR (\"data packing algorithm\"))) OR (\"element mean algorithm\"))".
• Removing quotes may allow a broader search: (((( data code algorithm ) OR ( data packing algorithm ))) OR ( element mean algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("data code algorithm") OR ("data packing algorithm"))) OR ("element mean algorithm"))*.