Perhaps you should try some spelling variations:
"data modeling algorithm" » "data scheduling algorithm" (Expand Search), "data models algorithm" (Expand Search), "spatial modeling algorithm" (Expand Search)
"fold boosting algorithm" » "fold cosine algorithm" (Expand Search)
"elements tree algorithms" » "elements three algorithms" (Expand Search), "elements free algorithms" (Expand Search)

Try widening your search to All Fields.

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