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