Perhaps you should try some spelling variations:
"query processing algorithm" » "pre processing algorithm" (Expand Search)
"element forest algorithm" » "element ore algorithm" (Expand Search)
"element te algorithm" » "element tide algorithm" (Expand Search), "element new algorithm" (Expand Search), "element de algorithms" (Expand Search), "element _ algorithm" (Expand Search), "element data algorithm" (Expand Search), "element mesh algorithm" (Expand Search)

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

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