Perhaps you should try some spelling variations:
"data processing algorithm" » "data processing algorithms" (Expand Search)
"spatial modeling algorithm" » "spatial scheduling algorithm" (Expand Search), "statistical modeling algorithm" (Expand Search)
"elements rf algorithm" » "elements rd algorithm" (Expand Search), "elements _ algorithms" (Expand Search), "elements _ algorithm" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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