Perhaps you should try some spelling variations:
"system sorting algorithms" » "system routing algorithm" (Expand Search), "system learning algorithms" (Expand Search), "system during algorithms" (Expand Search), "waste sorting algorithms" (Expand Search), "system strings algorithms" (Expand Search)
"data models algorithm" » "data modeling algorithm" (Expand Search), "data novel algorithm" (Expand Search), "data modbo algorithm" (Expand Search)
"element data algorithm" » "element data algorithms" (Expand Search), "element update algorithm" (Expand Search), "element atlas algorithm" (Expand Search), "settlement data algorithm" (Expand Search), "relevant data algorithm" (Expand Search), "movement data 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 models algorithm") OR ("system sorting algorithms"))) OR ("element data algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"data models algorithm\") OR (\"system sorting algorithms\"))) OR (\"element data algorithm\"))".
• Removing quotes may allow a broader search: (((( data models algorithm ) OR ( system sorting algorithms ))) OR ( element data algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("data models algorithm") OR ("system sorting algorithms"))) OR ("element data algorithm"))*.