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 mesh algorithm" » "element best algorithm" (Expand Search), "element mean algorithm" (Expand Search), "element means algorithm" (Expand Search), "element method algorithm" (Expand Search), "elements mges algorithm" (Expand Search), "element te algorithm" (Expand Search)
"element two algorithms" » "element ml algorithms" (Expand Search), "element _ algorithms" (Expand Search), "element art algorithms" (Expand Search), "element te algorithms" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("image routing algorithm") OR ((("element mesh algorithm") OR ("element two algorithms"))))~.
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• Removing quotes may allow a broader search: (( image routing algorithm ) OR ((( element mesh algorithm ) OR ( element two algorithms )))).
• Adding a wildcard symbol may retrieve word variants: (("image routing algorithm") OR ((("element mesh algorithm") OR ("element two algorithms"))))*.