Perhaps you should try some spelling variations:
"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 mean algorithm" » "elements means algorithm" (Expand Search), "elements new algorithm" (Expand Search), "elements each algorithm" (Expand Search), "elements mges algorithm" (Expand Search), "element mesh algorithm" (Expand Search), "elements fe algorithm" (Expand Search)
"elements two algorithms" » "elements ml algorithms" (Expand Search), "elements _ algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements wt algorithms" (Expand Search), "elements upon 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 mean algorithm") OR ("elements two algorithms"))) OR ("level coding algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements mean algorithm\") OR (\"elements two algorithms\"))) OR (\"level coding algorithm\"))".
• Removing quotes may allow a broader search: (((( elements mean algorithm ) OR ( elements two algorithms ))) OR ( level coding algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements mean algorithm") OR ("elements two algorithms"))) OR ("level coding algorithm"))*.