Perhaps you should try some spelling variations:
"element routing algorithm" » "element modeling algorithm" (Expand Search), "element finding algorithm" (Expand Search), "element making algorithm" (Expand Search), "element bonding algorithm" (Expand Search), "implement routine 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 based algorithm" » "engagement based 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 based algorithm") OR ((("element routing algorithm") OR ("level coding algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"element based algorithm\") OR (((\"element routing algorithm\") OR (\"level coding algorithm\"))))".
• Removing quotes may allow a broader search: (( element based algorithm ) OR ((( element routing algorithm ) OR ( level coding algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("element based algorithm") OR ((("element routing algorithm") OR ("level coding algorithm"))))*.