Perhaps you should try some spelling variations:
"end modeling algorithm" » "end scheduling algorithm" (Expand Search), "agent modeling algorithm" (Expand Search), "event modeling algorithm" (Expand Search), "_ modeling algorithm" (Expand Search)
"elements method algorithm" » "elements mould algorithm" (Expand Search)
"post clustering algorithm" » "most clustering algorithm" (Expand Search), "cost clustering 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 method algorithm") OR ((("post clustering algorithm") OR ("end modeling algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"elements method algorithm\") OR (((\"post clustering algorithm\") OR (\"end modeling algorithm\"))))".
• Removing quotes may allow a broader search: (( elements method algorithm ) OR ((( post clustering algorithm ) OR ( end modeling algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("elements method algorithm") OR ((("post clustering algorithm") OR ("end modeling algorithm"))))*.