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 fbe algorithm" » "element deer algorithm" (Expand Search), "element rd algorithm" (Expand Search), "elements fbe 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 sampling algorithm") OR ((("element fbe algorithm") OR ("element data algorithms"))))~.
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• Removing quotes may allow a broader search: (( element sampling algorithm ) OR ((( element fbe algorithm ) OR ( element data algorithms )))).
• Adding a wildcard symbol may retrieve word variants: (("element sampling algorithm") OR ((("element fbe algorithm") OR ("element data algorithms"))))*.