Perhaps you should try some spelling variations:
"post processing algorithm" » "post processing algorithms" (Expand Search), "text processing algorithm" (Expand Search)
"element fusion algorithm" » "element auction algorithm" (Expand Search), "element cosine algorithm" (Expand Search), "elements fusion algorithm" (Expand Search)
"element rf algorithm" » "element rd algorithm" (Expand Search), "element _ algorithms" (Expand Search), "elements rf algorithm" (Expand Search)

Try widening your search to All Fields.

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