Perhaps you should try some spelling variations:
"stool processing algorithm" » "stool routing algorithm" (Expand Search), "stool tracking algorithm" (Expand Search), "stool boosting algorithm" (Expand Search), "wood processing algorithm" (Expand Search), "food processing algorithm" (Expand Search), "signal processing algorithm" (Expand Search)
"data modeling algorithm" » "data making algorithm" (Expand Search), "data modelling algorithm" (Expand Search), "data models algorithm" (Expand Search)
"movement data algorithm" » "movement data algorithms" (Expand Search), "movement update algorithm" (Expand Search), "movement atlas algorithm" (Expand Search)

Try widening your search to All Fields.

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