Perhaps you should try some spelling variations:
"client learning algorithm" » "client learning algorithms" (Expand Search), "current learning algorithm" (Expand Search), "agent learning algorithm" (Expand Search), "excellent learning algorithm" (Expand Search)
"element tree algorithms" » "element three algorithms" (Expand Search), "element other algorithms" (Expand Search), "element art algorithms" (Expand Search), "element ree algorithms" (Expand Search), "element te algorithms" (Expand Search), "elements ree algorithms" (Expand Search)
"element swarm algorithm" » "element search algorithm" (Expand Search), "element software 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: (((("element tree algorithms") OR ("element swarm algorithm"))) OR ("client learning algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element tree algorithms\") OR (\"element swarm algorithm\"))) OR (\"client learning algorithm\"))".
• Removing quotes may allow a broader search: (((( element tree algorithms ) OR ( element swarm algorithm ))) OR ( client learning algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element tree algorithms") OR ("element swarm algorithm"))) OR ("client learning algorithm"))*.