Perhaps you should try some spelling variations:
"level modeling algorithm" » "level scheduling algorithm" (Expand Search), "event modeling algorithm" (Expand Search)
"implement routine algorithm" » "implement cosine algorithm" (Expand Search), "implemented routine algorithm" (Expand Search), "implementing routine algorithm" (Expand Search)
"element _ algorithm" » "elements _ algorithm" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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