Perhaps you should try some spelling variations:
"image routing algorithm" » "image modeling algorithm" (Expand Search), "image finding algorithm" (Expand Search), "image making algorithm" (Expand Search), "image 1_using algorithm" (Expand Search), "image 2_using algorithm" (Expand Search), "image 3_using algorithm" (Expand Search)
"element tree algorithms" » "element three algorithms" (Expand Search), "element art algorithms" (Expand Search), "element two algorithms" (Expand Search), "element ree algorithms" (Expand Search), "element te algorithms" (Expand Search), "element ore algorithms" (Expand Search)
"element based algorithm" » "engagement based algorithm" (Expand Search)

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

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