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)
"element swarm algorithm" » "element search algorithm" (Expand Search), "element svm algorithm" (Expand Search), "element software algorithm" (Expand Search)
"element ii algorithm" » "element _ algorithm" (Expand Search), "element _ algorithms" (Expand Search), "element g algorithm" (Expand Search), "element te 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 swarm algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"post processing algorithm\") OR (((\"element ii algorithm\") OR (\"element swarm algorithm\"))))".
• Removing quotes may allow a broader search: (( post processing algorithm ) OR ((( element ii algorithm ) OR ( element swarm algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("post processing algorithm") OR ((("element ii algorithm") OR ("element swarm algorithm"))))*.