Perhaps you should try some spelling variations:
"elements during algorithm" » "elements routing algorithm" (Expand Search), "elements making algorithm" (Expand Search), "elements mining algorithm" (Expand Search), "residents during 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 means algorithm" (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: (("element mesh algorithm") OR ((("elements during algorithm") OR ("level coding algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"element mesh algorithm\") OR (((\"elements during algorithm\") OR (\"level coding algorithm\"))))".
• Removing quotes may allow a broader search: (( element mesh algorithm ) OR ((( elements during algorithm ) OR ( level coding algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("element mesh algorithm") OR ((("elements during algorithm") OR ("level coding algorithm"))))*.