Perhaps you should try some spelling variations:
"case modeling algorithm" » "case making algorithm" (Expand Search), "based modeling algorithm" (Expand Search), "data modeling algorithm" (Expand Search), "a modeling algorithm" (Expand Search)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"pooled using algorithm" » "pooled using algorithms" (Expand Search), "pooled routing algorithm" (Expand Search), "pooled fusion algorithm" (Expand Search), "modeled using algorithm" (Expand Search), "solved using algorithm" (Expand Search)

Try widening your search to All Fields.

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