Perhaps you should try some spelling variations:
"post processing algorithm" » "post modeling algorithm" (Expand Search), "post routing algorithm" (Expand Search), "post tracking algorithm" (Expand Search), "waste processing algorithm" (Expand Search), "wood processing algorithm" (Expand Search), "food processing algorithm" (Expand Search)
"elements method algorithm" » "elements network algorithm" (Expand Search), "elements means algorithm" (Expand Search), "elements mean algorithm" (Expand Search), "element method algorithm" (Expand Search)
"present data algorithm" » "present data algorithms" (Expand Search), "present update algorithm" (Expand Search), "present atlas algorithm" (Expand Search), "presence data algorithm" (Expand Search), "present day algorithm" (Expand Search), "recent data algorithm" (Expand Search)

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