Perhaps you should try some spelling variations:
"plant processing algorithm" » "plant processing algorithms" (Expand Search), "image processing algorithm" (Expand Search), "text processing algorithm" (Expand Search), "melt processing algorithm" (Expand Search)
"wood processing algorithm" » "wood processing algorithms" (Expand Search)
"element de algorithms" » "element _ algorithms" (Expand Search), "element deer algorithm" (Expand Search), "element rd algorithm" (Expand Search), "elementi per algorithms" (Expand Search)

Try widening your search to All Fields.

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