Perhaps you should try some spelling variations:
"query processing algorithm" » "query processing algorithms" (Expand Search), "text processing algorithm" (Expand Search)
"relevant data algorithm" » "relevant jaya algorithm" (Expand Search), "relevant deer algorithm" (Expand Search)
"key scheduling algorithm" » "self scheduling algorithm" (Expand Search), "ahead scheduling 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: (("relevant data algorithm") OR ((("query processing algorithm") OR ("key scheduling algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"relevant data algorithm\") OR (((\"query processing algorithm\") OR (\"key scheduling algorithm\"))))".
• Removing quotes may allow a broader search: (( relevant data algorithm ) OR ((( query processing algorithm ) OR ( key scheduling algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("relevant data algorithm") OR ((("query processing algorithm") OR ("key scheduling algorithm"))))*.