Perhaps you should try some spelling variations:
"data routing algorithm" » "data cosine algorithm" (Expand Search), "data using algorithm" (Expand Search)
"element tree algorithms" » "elements tree algorithms" (Expand Search), "element three algorithms" (Expand Search), "element free algorithms" (Expand Search)
"element update algorithm" » "elements update algorithm" (Expand Search), "element updated 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: (("data routing algorithm") OR ((("element tree algorithms") OR ("element update algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"data routing algorithm\") OR (((\"element tree algorithms\") OR (\"element update algorithm\"))))".
• Removing quotes may allow a broader search: (( data routing algorithm ) OR ((( element tree algorithms ) OR ( element update algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("data routing algorithm") OR ((("element tree algorithms") OR ("element update algorithm"))))*.