Perhaps you should try some spelling variations:
"data modelling algorithm" » "data modeling algorithm" (Expand Search), "data processing algorithm" (Expand Search)
"elements method algorithms" » "elements two algorithms" (Expand Search), "elements both algorithms" (Expand Search), "elements other algorithms" (Expand Search), "element method algorithms" (Expand Search)
"present data algorithm" » "present data algorithms" (Expand Search), "present update algorithm" (Expand Search), "present atlas algorithm" (Expand Search), "presence data algorithm" (Expand Search), "present day algorithm" (Expand Search), "recent 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: (((("elements method algorithms") OR ("present data algorithm"))) OR ("data modelling algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements method algorithms\") OR (\"present data algorithm\"))) OR (\"data modelling algorithm\"))".
• Removing quotes may allow a broader search: (((( elements method algorithms ) OR ( present data algorithm ))) OR ( data modelling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements method algorithms") OR ("present data algorithm"))) OR ("data modelling algorithm"))*.