Perhaps you should try some spelling variations:
"plant processing algorithm" » "post processing algorithm" (Expand Search), "image processing algorithm" (Expand Search), "data processing algorithm" (Expand Search)
"element rf algorithm" » "element _ algorithm" (Expand Search), "element em algorithm" (Expand Search), "element ii algorithm" (Expand Search), "element ree algorithm" (Expand Search), "element ore algorithm" (Expand Search)
"event study algorithm" » "recent study algorithm" (Expand Search), "present study 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: (((("event study algorithm") OR ("element rf algorithm"))) OR ("plant processing algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"event study algorithm\") OR (\"element rf algorithm\"))) OR (\"plant processing algorithm\"))".
• Removing quotes may allow a broader search: (((( event study algorithm ) OR ( element rf algorithm ))) OR ( plant processing algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("event study algorithm") OR ("element rf algorithm"))) OR ("plant processing algorithm"))*.