Perhaps you should try some spelling variations:
"query processing algorithm" » "pre processing algorithm" (Expand Search)
"element forest algorithm" » "element ore algorithm" (Expand Search)
"element ree algorithm" » "element tree algorithms" (Expand Search), "element new algorithm" (Expand Search), "element em algorithm" (Expand Search), "elements ree algorithm" (Expand Search), "element te 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 ree algorithm"))) OR ("element forest algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"query processing algorithm\") OR (\"element ree algorithm\"))) OR (\"element forest algorithm\"))".
• Removing quotes may allow a broader search: (((( query processing algorithm ) OR ( element ree algorithm ))) OR ( element forest algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("query processing algorithm") OR ("element ree algorithm"))) OR ("element forest algorithm"))*.