Perhaps you should try some spelling variations:
"image processing algorithm" » "image modeling algorithm" (Expand Search), "image routing algorithm" (Expand Search), "image tracking algorithm" (Expand Search)
"element tide algorithm" » "element td3 algorithm" (Expand Search), "element leiden algorithm" (Expand Search), "element five algorithms" (Expand Search), "element te algorithm" (Expand Search), "element model algorithm" (Expand Search), "element study algorithm" (Expand Search)
"element mnb algorithm" » "element gnb algorithm" (Expand Search), "element anbs algorithm" (Expand Search), "element cnn algorithm" (Expand Search), "element mesh algorithm" (Expand Search)

Try widening your search to All Fields.

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