Perhaps you should try some spelling variations:
"data preprocessinb algorithm" » "data processing algorithm" (Expand Search), "data preprocessing algorithm" (Expand Search), "dataset preprocessing 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)
"element cnn algorithm" » "element _ algorithm" (Expand Search), "element new algorithm" (Expand Search), "element em 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: (((("element mesh algorithm") OR ("element cnn algorithm"))) OR ("data preprocessinb algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element mesh algorithm\") OR (\"element cnn algorithm\"))) OR (\"data preprocessinb algorithm\"))".
• Removing quotes may allow a broader search: (((( element mesh algorithm ) OR ( element cnn algorithm ))) OR ( data preprocessinb algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element mesh algorithm") OR ("element cnn algorithm"))) OR ("data preprocessinb algorithm"))*.