Perhaps you should try some spelling variations:
"image processing algorithm" » "image processing algorithms" (Expand Search)
"wood processing algorithm" » "wood processing algorithms" (Expand Search)
"element rl algorithm" » "element rd algorithm" (Expand Search), "element carlo algorithm" (Expand Search), "element _ algorithms" (Expand Search), "elements rl 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 ("wood processing algorithm"))) OR ("element rl algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"image processing algorithm\") OR (\"wood processing algorithm\"))) OR (\"element rl algorithm\"))".
• Removing quotes may allow a broader search: (((( image processing algorithm ) OR ( wood processing algorithm ))) OR ( element rl algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("image processing algorithm") OR ("wood processing algorithm"))) OR ("element rl algorithm"))*.