Perhaps you should try some spelling variations:
"elements control algorithm" » "element controls algorithm" (Expand Search), "helminths control algorithm" (Expand Search), "element content algorithm" (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)
"elements res algorithm" » "elements best algorithm" (Expand Search), "elements rast algorithm" (Expand Search), "elements new algorithm" (Expand Search), "elements ree algorithm" (Expand Search), "elements mges algorithm" (Expand Search), "elements ices algorithm" (Expand Search)

Try widening your search to All Fields.

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