Perhaps you should try some spelling variations:
"experimental update algorithm" » "experimental data algorithm" (Expand Search), "experimental phase algorithm" (Expand Search), "experimental case algorithm" (Expand Search), "experimental pass algorithm" (Expand Search), "experimental data algorithms" (Expand Search), "experimental ipca 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)
"element two algorithms" » "element ml algorithms" (Expand Search), "element _ algorithms" (Expand Search), "element art algorithms" (Expand Search), "element te algorithms" (Expand Search)

Try widening your search to All Fields.

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