Perhaps you should try some spelling variations:
"elements three algorithms" » "elements forest algorithms" (Expand Search), "elements based algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements ree algorithms" (Expand Search), "element ree algorithms" (Expand Search), "elements res algorithms" (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)
"select control algorithm" » "select controls algorithm" (Expand Search), "selected control algorithm" (Expand Search), "self control 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: (((("select control algorithm") OR ("elements three algorithms"))) OR ("level coding algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"select control algorithm\") OR (\"elements three algorithms\"))) OR (\"level coding algorithm\"))".
• Removing quotes may allow a broader search: (((( select control algorithm ) OR ( elements three algorithms ))) OR ( level coding algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("select control algorithm") OR ("elements three algorithms"))) OR ("level coding algorithm"))*.