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)
"present study algorithm" » "present wsindy algorithm" (Expand Search), "present td3 algorithm" (Expand Search), "present seu algorithm" (Expand Search)
"elements ree algorithm" » "elements tree algorithms" (Expand Search), "elements new algorithm" (Expand Search), "elements rf algorithm" (Expand Search), "element ree algorithm" (Expand Search), "elements res algorithm" (Expand Search), "elements fe algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("elements ree algorithm") OR ("present study algorithm"))) OR ("query processing algorithm"))~.
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• Adding a wildcard symbol may retrieve word variants: (((("elements ree algorithm") OR ("present study algorithm"))) OR ("query processing algorithm"))*.