Perhaps you should try some spelling variations:
"waste processing algorithm" » "data processing algorithm" (Expand Search), "image processing algorithm" (Expand Search), "wood processing algorithm" (Expand Search)
"element mesh algorithm" » "element best algorithm" (Expand Search), "element mean algorithm" (Expand Search), "element means algorithm" (Expand Search), "element method algorithm" (Expand Search)
"element rl algorithm" » "element rl algorithms" (Expand Search), "element rf algorithm" (Expand Search), "element ml algorithms" (Expand Search), "element ree algorithm" (Expand Search), "element ore algorithm" (Expand Search), "element _ 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 rl algorithm") OR ("element mesh algorithm"))) OR ("waste processing algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element rl algorithm\") OR (\"element mesh algorithm\"))) OR (\"waste processing algorithm\"))".
• Removing quotes may allow a broader search: (((( element rl algorithm ) OR ( element mesh algorithm ))) OR ( waste processing algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element rl algorithm") OR ("element mesh algorithm"))) OR ("waste processing algorithm"))*.