Perhaps you should try some spelling variations:
"image clustering algorithm" » "flare clustering algorithm" (Expand Search), "kmeans clustering algorithm" (Expand Search), "means clustering algorithm" (Expand Search)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"data finding algorithm" » "path finding algorithm" (Expand Search), "data fitting algorithm" (Expand Search), "case finding algorithm" (Expand Search)

Try widening your search to All Fields.

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