Perhaps you should try some spelling variations:
"implement modeling algorithm" » "element modeling algorithm" (Expand Search), "element modelling algorithm" (Expand Search), "implement making algorithm" (Expand Search)
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level finding algorithm" (Expand Search), "level routing algorithm" (Expand Search), "level according algorithm" (Expand Search), "level modeling algorithm" (Expand Search), "level using algorithm" (Expand Search)
"movement task algorithm" » "movement rast algorithm" (Expand Search), "movement pass algorithm" (Expand Search), "movement based algorithm" (Expand Search), "movement data algorithm" (Expand Search)

Try widening your search to All Fields.

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