Perhaps you should try some spelling variations:
"query processing algorithm" » "query modeling algorithm" (Expand Search), "query routing algorithm" (Expand Search), "query tracking algorithm" (Expand Search), "pre processing algorithm" (Expand Search)
"elements tree algorithms" » "elements three algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements two algorithms" (Expand Search), "elements ree algorithms" (Expand Search), "element ree algorithms" (Expand Search), "elements res algorithms" (Expand Search)
"elements wt algorithm" » "elements _ algorithm" (Expand Search), "elements ii algorithm" (Expand Search), "elements rf algorithm" (Expand Search), "elements b algorithm" (Expand Search), "elements fe algorithm" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("elements tree algorithms") OR ("elements wt algorithm"))) OR ("query processing algorithm"))~.
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• Removing quotes may allow a broader search: (((( elements tree algorithms ) OR ( elements wt algorithm ))) OR ( query processing algorithm )).
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