Perhaps you should try some spelling variations:
"post processing algorithm" » "post routing algorithm" (Expand Search), "post tracking algorithm" (Expand Search), "post boosting algorithm" (Expand Search), "waste processing algorithm" (Expand Search), "wood processing algorithm" (Expand Search), "food processing algorithm" (Expand Search)
"end modeling algorithm" » "end making algorithm" (Expand Search), "3d modeling algorithm" (Expand Search), "ann modeling algorithm" (Expand Search), "cfd modeling algorithm" (Expand Search)
"element based algorithms" » "element based algorithm" (Expand Search), "engagement based algorithms" (Expand Search)

Try widening your search to All Fields.

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