Perhaps you should try some spelling variations:
"query processing algorithm" » "query processing algorithms" (Expand Search), "text processing algorithm" (Expand Search)
"element method algorithm" » "element mould algorithm" (Expand Search)
"element erf algorithm" » "element rd algorithm" (Expand Search), "element deer algorithm" (Expand Search), "element search algorithm" (Expand Search), "elementi per 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 erf algorithm") OR ("element method algorithm"))) OR ("query processing algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element erf algorithm\") OR (\"element method algorithm\"))) OR (\"query processing algorithm\"))".
• Removing quotes may allow a broader search: (((( element erf algorithm ) OR ( element method algorithm ))) OR ( query processing algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element erf algorithm") OR ("element method algorithm"))) OR ("query processing algorithm"))*.