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)
"based mapping algorithm" » "based making algorithm" (Expand Search), "based mining algorithm" (Expand Search), "based learning algorithm" (Expand Search), "based machine algorithm" (Expand Search)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search), "elements method algorithm" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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