Perhaps you should try some spelling variations:
"implementing means algorithm" » "implementing change algorithm" (Expand Search), "implementing a algorithm" (Expand Search), "implementing udds algorithm" (Expand Search), "implementing search 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 mesh algorithm" » "element best algorithm" (Expand Search), "element mean algorithm" (Expand Search), "element best algorithms" (Expand Search), "element method algorithm" (Expand Search), "elements mges algorithm" (Expand Search), "element te algorithm" (Expand Search)

Try widening your search to All Fields.

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