Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search), "elements sampling algorithm" (Expand Search)
"element data algorithms" » "element jaya algorithm" (Expand Search), "elements data algorithms" (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 data algorithms") OR ((("element rf algorithm") OR ("element sampling algorithm"))))~.
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• Removing quotes may allow a broader search: (( element data algorithms ) OR ((( element rf algorithm ) OR ( element sampling algorithm )))).
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