Perhaps you should try some spelling variations:
"implement routine algorithm" » "implement cosine algorithm" (Expand Search)
"element mesh algorithm" » "element deer algorithm" (Expand Search), "element search algorithm" (Expand Search), "elements mesh algorithm" (Expand Search)
"present update algorithm" » "present updated algorithm" (Expand Search)

Try widening your search to All Fields.

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