Perhaps you should try some spelling variations:
"waste processing algorithm" » "waste processing algorithms" (Expand Search), "image processing algorithm" (Expand Search), "text processing algorithm" (Expand Search), "melt processing algorithm" (Expand Search)
"data sorting algorithms" » "data learning algorithms" (Expand Search)
"element data algorithm" » "element jaya algorithm" (Expand Search), "element deer algorithm" (Expand Search), "elements data algorithm" (Expand Search)

Try widening your search to All Fields.

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