Perhaps you should try some spelling variations:
"data processing algorithm" » "data modeling algorithm" (Expand Search), "data routing algorithm" (Expand Search), "data tracking algorithm" (Expand Search), "image processing algorithm" (Expand Search)
"post processing algorithm" » "post modeling algorithm" (Expand Search), "post routing algorithm" (Expand Search), "post tracking algorithm" (Expand Search), "waste processing algorithm" (Expand Search), "wood processing algorithm" (Expand Search), "food processing algorithm" (Expand Search)
"element ii algorithm" » "element _ algorithm" (Expand Search), "element _ algorithms" (Expand Search), "element g algorithm" (Expand Search), "element te 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 processing algorithm") OR ("post processing algorithm"))) OR ("element ii algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"data processing algorithm\") OR (\"post processing algorithm\"))) OR (\"element ii algorithm\"))".
• Removing quotes may allow a broader search: (((( data processing algorithm ) OR ( post processing algorithm ))) OR ( element ii algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("data processing algorithm") OR ("post processing algorithm"))) OR ("element ii algorithm"))*.