Perhaps you should try some spelling variations:
"post routing algorithm" » "post cosine algorithm" (Expand Search), "most routing algorithm" (Expand Search), "cost routing algorithm" (Expand Search)
"element method algorithm" » "element mould algorithm" (Expand Search), "elements method algorithm" (Expand Search)
"element multi algorithm" » "element mould algorithm" (Expand Search), "element auction algorithm" (Expand Search), "elements multi algorithm" (Expand Search)

Try widening your search to All Fields.

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