Perhaps you should try some spelling variations:
"element learning algorithm" » "element learning algorithms" (Expand Search), "student learning algorithm" (Expand Search)
"models using algorithms" » "models cosine algorithm" (Expand Search), "model using algorithms" (Expand Search)
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level colony algorithm" (Expand Search), "level scheduling 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: (("models using algorithms") OR ((("element learning algorithm") OR ("level coding algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"models using algorithms\") OR (((\"element learning algorithm\") OR (\"level coding algorithm\"))))".
• Removing quotes may allow a broader search: (( models using algorithms ) OR ((( element learning algorithm ) OR ( level coding algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("models using algorithms") OR ((("element learning algorithm") OR ("level coding algorithm"))))*.