Perhaps you should try some spelling variations:
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level modeling algorithm" (Expand Search), "level finding algorithm" (Expand Search), "level according algorithm" (Expand Search), "level using algorithm" (Expand Search)
"elements mdem algorithms" » "elements ml algorithms" (Expand Search), "elements em algorithm" (Expand Search), "elements tree algorithms" (Expand Search), "elements mges algorithms" (Expand Search), "elements under algorithms" (Expand Search), "element model algorithms" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("elements mdem algorithms") OR ((("element method algorithm") OR ("level coding algorithm"))))~.
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• Removing quotes may allow a broader search: (( elements mdem algorithms ) OR ((( element method algorithm ) OR ( level coding algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("elements mdem algorithms") OR ((("element method algorithm") OR ("level coding algorithm"))))*.