Perhaps you should try some spelling variations:
"plant processing algorithm" » "post processing algorithm" (Expand Search), "image processing algorithm" (Expand Search), "data processing algorithm" (Expand Search)
"elements ree algorithm" » "elements tree algorithms" (Expand Search), "elements new algorithm" (Expand Search), "elements em algorithm" (Expand Search), "elements _ algorithm" (Expand Search), "elements present algorithm" (Expand Search), "elements related algorithm" (Expand Search)
"elements ppo algorithm" » "elements pso algorithm" (Expand Search), "elements pso algorithms" (Expand Search), "elements two algorithms" (Expand Search), "elements ppm algorithm" (Expand Search), "elements upon algorithm" (Expand Search), "elements _ algorithm" (Expand Search)

Try widening your search to All Fields.

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