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"))))*.