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