Perhaps you should try some spelling variations:
"query processing algorithm" » "query processing algorithms" (Expand Search), "text processing algorithm" (Expand Search)
"element modeling algorithm" » "element scheduling 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.

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