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

Try widening your search to All Fields.

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