Perhaps you should try some spelling variations:
"post processing algorithm" » "post processing algorithms" (Expand Search), "text processing 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)
"element ii algorithm" » "element rd algorithm" (Expand Search), "element _ algorithms" (Expand Search)

Try widening your search to All Fields.

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