Perhaps you should try some spelling variations:
"data processing algorithm" » "data processing algorithms" (Expand Search)
"data modeling algorithm" » "data scheduling algorithm" (Expand Search), "data models algorithm" (Expand Search), "spatial modeling algorithm" (Expand Search)
"element ii algorithm" » "element rd algorithm" (Expand Search), "element _ algorithms" (Expand Search), "elements ii algorithm" (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 ("data processing algorithm"))) OR ("element ii algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"data modeling algorithm\") OR (\"data processing algorithm\"))) OR (\"element ii algorithm\"))".
• Removing quotes may allow a broader search: (((( data modeling algorithm ) OR ( data processing algorithm ))) OR ( element ii algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("data modeling algorithm") OR ("data processing algorithm"))) OR ("element ii algorithm"))*.