Perhaps you should try some spelling variations:
"time processing algorithm" » "image processing algorithm" (Expand Search), "pre processing algorithm" (Expand Search), "antigen processing algorithm" (Expand Search)
"elements tree algorithms" » "elements three algorithms" (Expand Search), "elements other algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements ree algorithms" (Expand Search), "element ree algorithms" (Expand Search), "elements res algorithms" (Expand Search)
"element forest algorithm" » "element ore algorithm" (Expand Search)

Try widening your search to All Fields.

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