Perhaps you should try some spelling variations:
"data preprocessing algorithm" » "data processing algorithm" (Expand Search)
"element mesh algorithm" » "element best algorithm" (Expand Search), "element mean algorithm" (Expand Search), "element means algorithm" (Expand Search), "element method algorithm" (Expand Search), "elements mges algorithm" (Expand Search), "element te algorithm" (Expand Search)
"element cnn algorithm" » "element mean algorithm" (Expand Search), "element _ algorithm" (Expand Search), "element ii algorithm" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element mesh algorithm\") OR (\"element cnn algorithm\"))) OR (\"data preprocessing algorithm\"))~".
• Removing quotes may allow a broader search: (((( element mesh algorithm ) OR ( element cnn algorithm ))) OR ( data preprocessing algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("element mesh algorithm") OR ("element cnn algorithm"))) OR ("data preprocessing algorithm"))*.