Perhaps you should try some spelling variations:
"post processing algorithm" » "post processing algorithms" (Expand Search), "text processing algorithm" (Expand Search)
"end processing algorithm" » "end processing algorithms" (Expand Search), "text processing algorithm" (Expand Search), "melt processing algorithm" (Expand Search), "_ processing algorithm" (Expand Search)
"element mean algorithm" » "element deer algorithm" (Expand Search), "element search algorithm" (Expand Search), "elements mean 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 processing algorithm") OR ("end processing algorithm"))) OR ("element mean algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"post processing algorithm\") OR (\"end processing algorithm\"))) OR (\"element mean algorithm\"))".
• Removing quotes may allow a broader search: (((( post processing algorithm ) OR ( end processing algorithm ))) OR ( element mean algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("post processing algorithm") OR ("end processing algorithm"))) OR ("element mean algorithm"))*.