Perhaps you should try some spelling variations:
"post tracking algorithms" » "post training algorithms" (Expand Search), "post learning algorithms" (Expand Search), "post making algorithm" (Expand Search), "point tracking algorithms" (Expand Search), "poor tracking algorithms" (Expand Search)
"data modeling algorithm" » "data making algorithm" (Expand Search), "data modelling algorithm" (Expand Search), "data models 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: (((("post tracking algorithms") OR ("data modeling algorithm"))) OR ("element data algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"post tracking algorithms\") OR (\"data modeling algorithm\"))) OR (\"element data algorithm\"))".
• Removing quotes may allow a broader search: (((( post tracking algorithms ) OR ( data modeling algorithm ))) OR ( element data algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("post tracking algorithms") OR ("data modeling algorithm"))) OR ("element data algorithm"))*.