Perhaps you should try some spelling variations:
"post processing algorithm" » "post processing algorithms" (Expand Search), "text processing algorithm" (Expand Search)
"element rl algorithms" » "element _ algorithms" (Expand Search), "element rd algorithm" (Expand Search), "elements rl algorithms" (Expand Search)
"element ii algorithm" » "element rd algorithm" (Expand Search), "element _ algorithms" (Expand Search), "elements ii algorithm" (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 ii algorithm") OR ("element rl algorithms"))))~.
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• Removing quotes may allow a broader search: (( post processing algorithm ) OR ((( element ii algorithm ) OR ( element rl algorithms )))).
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